







La longueur d'une corde 
20030122 

Un eleve pose la question : Existetil une formule permettant de calculer la longueur d'une corde quelquonque d'un cercle connaissant uniquement le rayon de celuici? Si oui quelle estelle? Claude Tardif lui répond. 





A circle problem 
20180330 

ahamed pose la question : the diameters of a circle AB and CD intersect each other at O perpendicularly. Then a chord DF is drawn. AB and DF intersect at E. DE=6cn and EF=2cm.find the area of thw circle Penny Nom lui répond. 





Distance between a chord and its arc on a circle 
20180323 

Doug pose la question : Specifically, what is the subject distance for the Earth orbiting for 27 days. Assume the orbit of the Earth to be a circle have a 93 million mile radius. Assume the angle of arc to be (27/365) x 360 degrees. Thank you. Penny Nom lui répond. 





A circle and two chords 
20180321 

Ella pose la question : In a circle, a 30 unit chord is 5 units closer to the center than a 20 unit chord. Find the radius. Penny Nom lui répond. 





Heights at various points along an arc 
20160415 

Isiah pose la question : So I am working on a problem with a few friends; you have an arc with the center of its chord at 0,0. We also have a known sagitta and a known radius of curvature.
How do we calculate the height extending in both the positive and negative directions?
Central sag: 2.48
Chord length: 9.6 Penny Nom lui répond. 





A circle and a chord 
20160310 

Mujtaba pose la question : The distance of a chord of length 16 cm, from the centre of the circle of diameter 20 cm Penny Nom lui répond. 





A chord of a circle, the central angle and the radius 
20160126 

Nishan pose la question : If chord length is given along with angle then how to calculate the radius. Penny Nom lui répond. 





Reinforced steel mesh in a circular foundation 
20150822 

Padmesh pose la question : in a circular foundation we are laying a reinforced steel mesh . i.e., like chords in both ways. the circle diameter is 2.91m and rods are placed 0.1m spacing. so I want to find the number of rods present in that circle. here by I am attaching an auto cad drawing for your reference Penny Nom lui répond. 





The number of possible musical notes using an nkey instrument 
20150504 

Farihin pose la question : Lets say that i have keys, and each key is for notes of a musical instrument,
So i wanted to find out the number of notes i can get for a certain number keys,
of course in the form of an equation. Notes can use as many keys, it can use 1, or 2, or 3, or even 100.
Notes in real life is not as such, but ignore reality.
I tried doing this but i can't seem to find a formula for it.
For example, i have 4 keys, say A, B, C, and D.
so, for notes that uses one key are 4, which is A, B, C, and D themselves.
for notes that uses two keys are 6,
AB, AC, AD, BC, BD and CD.
for notes that uses three keys are 4,
ABC, ABD, ACD and BCD.
lastly for notes that uses all four keys is 1, ABCD.
So, the total will be 4+6+4+1=15#
The nth term for the first equation is n, the second is [(n^2)n]/2
the third and the fourth, i don't know but the final answer should be like,
n + [(n^2)n]/2 + [3rd] + [4th]
Sorry for the long question though... Penny Nom lui répond. 





Two concentric circles 
20150421 

Juniper pose la question : Two concentric circles have radii of 4 cm and 8 cm. A segment is drawn so that it is tangent to the smaller circle and a chord of the larger circle. How long is the segment? Penny Nom lui répond. 





A circle and a chord 
20150207 

Dakota pose la question : If the diameter of a circle is 48 cm, find the shortest distance from a chord of length 34 cm to the center of the circle Penny Nom lui répond. 





Two chords in a circle 
20140913 

Carlos pose la question : Find the length of the radius of a circle in which a
chord of length 6 units is twice as far from the
center as a chord of length 12 units Penny Nom lui répond. 





A chord and an arc of a circle 
20140806 

Luis pose la question : Hello I am trying to figure out how to get chord lengths of quarter points for a circle. I work with large diameter circles and I need to be able to find chord length from 0 degrees to 90 degrees, 0 degrees to 270 degrees, 270 degrees to 180 degrees and 90 degrees to 180 degrees. Can you please use 100ft. diameter as example and work out the problem. I'm sorry if I use wrong terminology, I'm really bad at math . Thank you in advance for your time and help I really appreciate it. Harley Weston lui répond. 





A chord length of 2 cm 
20140313 

prema pose la question : I am having only chord length as 2cm. how to find arc length and degree Penny Nom lui répond. 





Parallel chords 
20140306 

Raj pose la question : AB andCD are two chords which are in the same side of the circle.The length of AB=12 and CD= 24.if the distance between them is 4 then find their radius. Pls help me I just believe on you guys I am having my exam after 3 days p lui répond. 





Two parallel chords of a circle 
20130730 

Don pose la question : two parallel chords of a circle AB and CD on the same side from the center measure 6cm and 11 cm respectively. The distance between the 2 chords is 3 cm. Find the radius Penny Nom lui répond. 





A circle and a chord 
20130514 

yashvardhan pose la question : A circle which radius 13cm. Find the length of the chord which is 5 cm away from center Penny Nom lui répond. 





A circle, a chord and an arc 
20130416 

Tim pose la question : Morning,
I was told the chord is 3000mm and the depth of chord is 300mm, I can
find the radius,(1500 squared + 300 Squared) Divided by (300 + 300)
but don't know how to calculate the length of the circle defined by the chord.
Regards
Tim
Penny Nom lui répond. 





The length and depth of a chord 
20120816 

Tim pose la question : Can I find the radius of a circle, if I have a chord of 2400mm, and a depth
between the center of the chord and the perimeter of the circle of 150mm ?
Thanks
Tim Penny Nom lui répond. 





The shortest chord 
20120726 

ANJANA pose la question : AB is a diameter of a circle.
C is a point in AB such that CA = 9 cm and CB = 25 cm.
Find the length of the shortest chord through C. Chris Fisher lui répond. 





The depth of a chord 
20120516 

Tim pose la question : For a circle of Diameter 12 Mtrs, I have a chord length of 2 Mtrs,
How can i calculate the distance from the middle of the chord to the
perimeter of the circle Penny Nom lui répond. 





A common chord to two circles 
20120422 

Nicole pose la question : What is a common chord between two circles and how is it found in the problem: Two circles intersect and have a common chord, the radii of the circles are 13 and 15, the distance between the circle's centers is 14, find the common chord. Penny Nom lui répond. 





A circle and a chord 
20120211 

Sophia pose la question : The diagram shows a circle with a chord that is 10cm long. The middle of the chord is 12cm from the centre of the circle. Calculate the radius.
Chord length is 10cm.
The distance from the centre to chord is 12 cm. Penny Nom lui répond. 





Two circles 
20120208 

crisfe pose la question : find the point where the common cord of the circles x2+y2=25, x2+y212x6y+35=0 process there line centers. what point they intercepts? Penny Nom lui répond. 





Two parallel chords 
20111204 

violet pose la question : Two parallel chords of a circle AB and CD on the same side of the centre measure 6 cm and 11 cm respectively. Find the radius. Chris Fisher and Walter Whiteley lui répond. 





The length of an arc 
20110824 

nuel pose la question : Is there any formula to calculate the arc length from only the chord length and angle between the chord and tangent of the arc at its endpoint ? Penny Nom lui répond. 





The length of a chord 
20110425 

G pose la question : A 120 degree central angle intercepts a circle at the points A and B. The radius of the circle is 10 cm. Find the length of chord AB. Penny Nom lui répond. 





A region bounded by a chord and an arc 
20110228 

Gene pose la question : find the area of a segment bounded by a chord and a 45 degree arc of a 36" circle Robert Dawson lui répond. 





Two chords in a circle 
20101202 

girma pose la question : one chord of a circle is 8cm long and it's distance from the center is 4cm long.what will be the length of another chord, of the same circle ,which is 2cm from the center Penny Nom lui répond. 





Two perpendicular chords 
20100911 

edwin pose la question : two perpendicular chords AB and CD intersect at P. if X,Y are their midpoints and M the centre of the circle, prove that MP=XY. I do not a have clue on how to do it so can you please help me with it Robert Dawson lui répond. 





Arc length and Chord length 
20100313 

Darryl pose la question : Is there a formula to determine the chord length of an arc knowing only the arc length and the arc depth (sagitta)? I know you can't find the radius with only these two inputs, but can you find the chord length? Harley Weston lui répond. 





The distance from a chord to an arc 
20100211 

matt pose la question : hello, I have to layout a radius without being able to pull from the center my radius is 3819.53 feet and i have a chord length of 275.59 feet if i broke that up into 25.05 feet sections how would i calculate the lengths from my chord to that radius? Robert Dawson lui répond. 





A tunnel from Toronto to Montreal 
20100125 

Dave pose la question : I want to make a tunnel from Toronto to Montreal (for example)
Something like this
http://mathcentral.uregina.ca/QQ/database/QQ.09.09/h/grant1.html

My coordinates are 45.442455,73.861340 (Montreal) and 43.442455, 79.861340 (Toronto)
I need to know how to find arc distance, chord distance and radius
What websites can i find for this subject
Google has many but they are useless (blah blah) websites
LOL
Thanks Chris Fisher and Robert Dawson lui répond. 





The height of an arch 
20100102 

kamer pose la question : given the radius 1.696 also the cord length 1.958 find the height between the cord and the arch. Penny Nom lui répond. 





A question from a boat builder 
20100101 

Grant pose la question : I am a boat builder, trying to lay out shape of side's elevation.
My question is, how do I define the length of a circle's radius, if I know the chord length
(20 ft) and the segment of the radius between the chord and the circle is known (7 inches)? Penny Nom lui répond. 





Chord length given the length & radius of an arc 
20091231 

Wayne pose la question : Given the length & radius of an arc, is there a formula that will accurately calculate the chord length?
I'm an architectural designer, and would need it explained in layman's terms. Thank you.
Wayne Penny Nom lui répond. 





Sagitta 
20090910 

Robert pose la question : Can you please tell me if there is a formula to figure out the Sagitta of an
arc when you know the radius, chord length, and arc length? Chris Fisher and Harley Weston lui répond. 





Find the central angle 
20090818 

Larissa pose la question : In a circle, the length of a chord AB is 4 cm and the length of the arc AB is 5 cm. Find the central angle theta, in radians, correct to four decimal places. Then give the answer to the nearest degree. I think I'm supposed to use Newton's method, but am not sure how to start with this problem. Harley Weston lui répond. 





Two chords 
20090711 

Sarah pose la question : Two parallel chords in the same circle have lengths of 30 cm and 48 cm. The circle has a radius of 25 cm. How far apart are the chords? Penny Nom lui répond. 





Arc length 
20090710 

farhad pose la question : hi
i need to measure length of arc by having only two measurements, first the length of the chord and
the height of the curve.
if i have a simple calculator that haven't sin cos tang (i want to calculate it in my mind) Stephen La Rocque lui répond. 





A circle and a chord 
20090710 

Paul pose la question : I have three known points. X1,Y1 = 0,0 X2,Y2 = 3,1 and X3,Y3 = 10,0. Given these three points, how do I find the height from the center of the 10' chord to the circle's circumference above? Stephen La Rocque and Harley Weston lui répond. 





The central angle of a chord 
20090406 

Dale pose la question : How do I find the central angle if I only have the cord length and radius. Harley Weston lui répond. 





The length of an arc 
20090404 

Dale pose la question : If I have the length of the chord and the height of the arc can I find the arc length with these dimensions? Harley Weston lui répond. 





The length of a chord 
20090320 

shirley pose la question : show that the chord is equal to two times the radius time the sin of theta/2.
The chord is connected to the two radii and theta is a central angle between the two radii Penny Nom lui répond. 





Two chords in a circle 
20090119 

azlaan pose la question : prove that line joining the midpoint of 2 equal chords substain equal angle with the chord? Robert Dawson lui répond. 





Parallel distances from arc of circle to its chord 
20090116 

Roger pose la question : Give the length of a chord of a circle and the height of the arc, how do I
find the lengths of equally spaced parallel lines drawn from the chord to
the arc. (Think of the lengths of vertical slats in an archtopped bed head
board.) Chris Fisher and Stephen La Rocque lui répond. 





A chord 
20090101 

Deepa pose la question : Why in a circle,a chord is called as the longest diameter?
(A chord does not passes through the centre of the circle but a diameter passes through the centre) Penny Nom lui répond. 





A circle and a chord 
20081117 

Lydz pose la question : The circle has a radius of 8cm
The chord is 13cm long.
Find the distance from the centre of the circle, to the chord. Penny Nom lui répond. 





A circle and a chord 
20081113 

jane pose la question : the center of a circle is at (3,2) and its radius is 7. find the length of the chord, which is bisected at (3,1). Penny Nom lui répond. 





An arc and an angle 
20081005 

Cory pose la question : I have a chord length of 150'. From the left starting point, I know that
30' right of starting point is 9' in height. This would be the top of the arc.
What is the arc in degrees and can anyone display an image to help me
understand? Penny Nom lui répond. 





The area of an arched transom 
20080928 

Ivan pose la question : What is the formula for figuring out the square footage of arched transom windows & doors? Harley Weston lui répond. 





Radii and Chords Create a NonRight Triangle 
20080822 

Beary pose la question : AOC is a diameter of circle O. Line AB is 12, and lines OA and OC (the radii) are 10. Find the length of line BO and chord BC. Janice Cotcher lui répond. 





Irregular polygon and Circle that Intersects All Sides 
20080820 

Xetro pose la question : Hi,
Suppose you have an irregular polygon(convex or concave) with n > 3 sides.
The question is  Find some circle that will cut(in limiting case  touch) all the sides of that polygon.
It doesnt matter how many times it cuts the side(1 or 2), it just have to cut or touch it.
How to find such a circle? or how to decide if such circle even exists?
What if those segments do not form a polygon but are some arbitrary segments ?
Really want to know how to do it................
Thanks a lot..
Regards,
Xetro Janice Cotcher lui répond. 





Subdividing a chord 
20080818 

austin pose la question : Here is my question. Imagine I have a circle of known radius 25 feet, and a
chord with a mid point height of 6 inches from a central point on the chord
to the circumference of the circle. I wish to divide this chord into a
number of equal divisions. How can I calculate the measurement of the
perpendicular line at each division of the chord to the circumference and at
a 90 degrees at each division Penny Nom lui répond. 





Arclength and sectorangle 
20080806 

Benson pose la question : If chord length, radius are given, How to find the sector angle and arclength Janice Cotcher lui répond. 





The length of an arc 
20080714 

Chris pose la question : trying to find the length of an arc or segment of a circle when
the radius or circumference is unknown
take a circle, put a line across the circle label it A /B /C
A and C are the end points, B is the middle
line length is 86. From B to the side of circle is 16. Label that point D
need to find the length of A D C Penny Nom lui répond. 





Chords and arcs 
20080711 

Ronnie pose la question : We are trying to build a semi life size ark decoration , and we are trying to cut the sides out . The curved sides and we can't figure our radius , all we know is that our chord length is 24ft. any suggestions on how to find the radius or maybe even the arc length or circumference or diameter? Harley Weston lui répond. 





One chord is twice as long as another 
20080530 

Stacey pose la question : In a circle, If one chord is twice as long as another, is the longer chord's arc also twice the size of the smaller chord? True or False Chris Fisher lui répond. 





The distance from the chord to the centre 
20080504 

sle pose la question : What is the method for figuring this type of question out?
in a circle whose radius is 25, a chord has a length of 40. find the distance of this chord from the center of the circle Penny Nom lui répond. 





Two overlapping circles 
20080426 

Michelle pose la question : Two overlapping circles O and Q have the common chord AB (vertical line between the overlapping circles). If AB is 6 and circle O has a radius of length 4 (horizontal line going through the overlapping circles and touching the side of the circle) and circle Q has a radius of length 6, how long is OQ. Penny Nom and Walter Whiteley lui répond. 





Chord, radius, arc length and central angle 
20080415 

Cindy pose la question : There is a railroad curve with a chord length of 2000 ft. and a central angle of 35 degrees. What is the radius and arc length of the circular arc? Stephen La Rocque lui répond. 





Finding the radius when only given chord length 
20080403 

Lorraine pose la question : There are two chords in a circle, an 8 inch chord and a 10 inch chord. The 8 inch chord
is twice the distance from the center as the 10 inch chord. What is the radius? Stephen La Rocque lui répond. 





A common chord to two circles 
20080309 

shubha pose la question : please help me out with this problem.
find the length of the common chord of the intersecting circles x2+y24x5=0
and x2+y22x+8y+9=0 Stephen La Rocque lui répond. 





A chord of a circle 
20080207 

Mahesh pose la question : find the length of the cord intercepted by a circle with equation X2 +Y2 6X+4Y12=0 with a line of equation 4X3Y+2=0
Pl help me solve this problem
thanks
MNK Stephen La Rocque lui répond. 





How would one find the radius? 
20071229 

Ned pose la question : Given an arc with length of 192 inches (don't know chord length),
and arc height of 6 inches, how would one find the radius? Stephen La Rocque and Harley Weston lui répond. 





The radius of an arch 
20071110 

Mark pose la question : How do you determine the raduis or diameter of a circle based on the folowing information:
1. The distance along the circle between two points is 35'2". This creates an arch.
2. The (chord) distance between the two points is 30'8".
3. The distance from the center of the chord (on a 90 degree) to the arch is 6'10 3/4". Harley Weston lui répond. 





Given the arc length and chord length, what is the radius? 
20071010 

Wayne pose la question : I have the actual length of an arc plus the length of the cord. How do I determine the radius of the arc. Harley Weston lui répond. 





Finding radius given chord length and distance to center 
20071004 

Venus pose la question : a chord of 48mm long is 7mm from the center of the circle. What is the radius of the circle? Stephen La Rocque lui répond. 





Equation of a circle circumscribing a triangle with given vertices 
20071001 

Randy pose la question : How do I determine the equation of a circle when it is circumscribed by a
triangle whose vertices are (1, 6), (3, 2), and (2, 5)? Stephen La Rocque lui répond. 





The area of a circle knowing only the length of a chord 
20070905 

James pose la question : I need some help in the right directions with a problem. I was presented with a problem where I need to find the area of a circle knowing only the length of a chord.
the is a circle in the center of a larger circle (which the size of either could change) the only thing that matter is that the chord is 100 ft long and rests on top of the smaller circle. Stephen la Rocque and Brennan Yaremko lui répond. 





A chord of a parabola 
20070817 

Robin pose la question : I am going to show that the chord PtPt' of the parabola has the equation 2xy(t+t')+2att'
A point on the parabola can be represented as Pt= (at2, 2at). Penny Nom lui répond. 





Chords 
20070808 

HIMANSHU pose la question : we know that every straight line is the chord of a big circle. i have a circle
with radius 3.5feet. I want to know what is the length of the chord,
which would be a straight line. Stephen La Rocque lui répond. 





Two chords in a circle 
20070729 

Jerry pose la question : Points A and C lie on the circumference of a circle. B is a point inside the circle. When produced, AB and CB meet the circumference at points E and D respectively. Prove that AB = CB, then EB = BD. Stephen La Rocque lui répond. 





Circles and chords 
20070315 

Henry pose la question : Where do you place a chord in a circle such that it divides the area
of the circle 1/3 and 2/3? Also, what is the length of the chord? Stephen La Rocque lui répond. 





Chords and arc lengths 
20070308 

Angela pose la question : my dad, who is a welder, asked me a question pertaining to chords and points on an arc to which I cannot for the life of me find an answer or an equation. if you could help, it would be much appreciated. I am sending an attachment of the problem. Stephen La Rocque lui répond. 





Chord length 
20061101 

Tony pose la question : how do i find a chord length when all i have is arc length (13.633m) and the radius (89.500m) Stephen La Rocque lui répond. 





Find the radius knowing the chord length and... 
20060728 

Jim pose la question : If I know the length of a chord and its distance from the diameter, how do I calculate the radius of the circle?
Stephen La Rocque lui répond. 





The chord length of a polygon 
20060614 

Krishna pose la question : I have to find out the chord length of a polygon  Tetradecagon ! The Radius of the Circle is 11.5 Cms. The Circle is intersepted by 14 arcs. Then how to find out the chord length? Stephen La Rocque lui répond. 





The length of a chord 
20051103 

Sue pose la question : How do you determine the length of a chord when given the diameter of the circle (1.6m) and that the angle = 7π/8 Penny Nom lui répond. 





A line that intersects a circle 
20051018 

Bruce pose la question : I would like to solve the following problem illustrated below. How do you calculate the length of a line that intersects a circle. Penny Nom lui répond. 





How would I find the length of the radius? 
20051015 

Stace pose la question : If given the length of a chord (121") and the distance from the midpoint of the arc to the midpoint of a chord (12"), how would I find the length of the radius?
Penny Nom lui répond. 





The length of a circle's chord 
20050928 

A homebuilder pose la question : find the length of a circle's chord with a known arc length and radius/diameter lengths. Penny Nom lui répond. 





The length of a chord 
20050908 

A student pose la question : how do you find the length of a chord given the angle and radius of the circle Penny Nom lui répond. 





Given only the length of an arc & the length of its chord find the radius? 
20050907 

Robert pose la question : Given only the length of an arc (72) & the length of its cord (71), how to find the radius? Penny Nom lui répond. 





The radius of an arc 
20050819 

Jared pose la question : I need to be able to calculate the radius of an arc on an existing structure (Supports for Fifth Ave Dimensional Text). I have the overall length of this structure, but, the complication I believe lies in the fact that it is a curve mounted onto a flat section of wall on either side of a very mild curve, therefore, measuring the middle of the wall to the top of the arc does me little good...The reason I need this is to be able to replicate the above curve on a similar structure to be mounted below it...Also, because the client wants the structure mounted on the inside of the opening below the existing, the beginning and end point of the new structure would be lower than the existing, so, I do not believe that it is possible to exactly replicate the radius of the above curve? Penny lui répond. 





The length of a chord 
20050113 

A parent pose la question : Does anyone have a formula for calculating the chord length for a segment of a circle when you know the radius and the enclosed angle or radian ? Penny Nom lui répond. 





Arcs and chords 
20050109 

Aniesha pose la question : A chord of a circle is 48 centimeters long and is 10 centimeters from the center of the circle. Find the radius? Penny Nom lui répond. 





The center of a circle 
20040526 

Wan pose la question : I am trying to find the radius of an arc. The only things i know about the arc is all referenced from the line of tangency to the arc. on both sides i have a differnt horizontal perpendicular distance to the point of tangency.
left side * right side (*=point of tangency). Then i have 2 difference vertical perpendicular distance of the end points to the line of tangency. I know it sounds very bad in text but this is all i know about the arc. Can you help me find the radius? Penny Nom lui répond. 





The length of a chord 
20031103 

David pose la question : When Radius=400.00' and Arc=130.58' what is the Cord distance in feet? Penny Nom lui répond. 





Two chords 
20031007 

Lori pose la question : Chords AB and CD of circle O intersect at E. If AE=4, AB=5, CE=2, Find ED. Penny Nom lui répond. 





The length of an arc 
20030224 

Gavin pose la question : does anyone have a formula for calculating the length of an arc if I have the circle radius and the cord length of the arc?? Penny Nom lui répond. 





The length of an arc 
20021127 

Nancy pose la question : If all I have is the length between 2 ends of an arc (72"), how do I find the length of the arc at its apex and the radius? Penny Nom lui répond. 





Subdividing a circle 
20021111 

David pose la question : Say you have a cirlcle. Then you draw 2 dots on the circle. Then you connect the dots with lines. The circle is divided into 2 parts. If you do the same with 3 dots and connect each dot to each dot with a line then you get a circle with 4 parts. 4 dots with lines connecting all (6 lines) = 8 parts.... Claude Tardif lui répond. 





How would you find the length of the chord? 
20021031 

A draftsperson pose la question : If given the length of an arc and the distance from the midpoint of the arc to the midpoint of a chord, how would you find the length of the chord and the radius of the arc. The chords endpoints are the same as the the arcs endpoints. Penny Nom lui répond. 





Chord length 
20020517 

Ashlie pose la question : How do you find the chord length of one section of a chord if you only have the diameter length and the other whole chord length. WV is the diameter and equals 16. XY is perpendicular to it, and equals 10. They intersect at pt. Z. I need to know what WZ equals. Please help! Penny Nom lui répond. 





Three chords 
20010628 

Paul pose la question : AE is a diameter of a circle and AC, CD and DE are chords of lengths 1, 2 and 3 respectively. (See the diagram.) Find the ridius of the circle. Harley Weston lui répond. 





A chord length 
20001017 

Al Paas pose la question : How to determine the length of a chord given the diameter of the circle and the maximum distance from the chord to The circle? Chris Fisher lui répond. 





A parabola problem 
20000323 

Morin pose la question : I need to prove that if parabola x^{2}=4py has a chord (not necessarily a focal chord) intersecting it at points A and B, with tangents to the parabola at points A and B that intersect at C, then a line drawn through C and the midpoint of the chord M is parallel to the yaxis. Further, prove that the point D where this line intersects the parabola is the midpoint of line CM. Penny Nom lui répond. 





Two Chords 
19980929 

Jennifer Cane pose la question : Question: two parallel chords of a circle, AB and CD, have lengths of 10 cm and 17 cm respectively. The diameter of the circle is 21 cm. Find the shortest distance between the chords. Harley Weston lui répond. 





The Length of a Chord. 
19970726 

Nathan Arthur pose la question : Picture a 9 inch diameter circle. Inside that circle is a 6 inch diameter circle tangent to it. Then, tangent to both circles is a 3 inch diameter circle. So there are three circles, two smaller ones inside a big one, all of them just touching but not overlapping. Now picture a chord on the 9 inch circle that is created by making a line that is tangent to both the 6 and the 3 inch circles and extending it to the edge of the 9 inch circle. I need the length of that cord. Chris Fisher lui répond. 





Some Circle Questions. 
19970225 

Staci Vawser pose la question : A circle with a radius of 10m is drawn. A chord is drawn across the circle. How is the area that is formed between the chord and the arc calculated? Harley Weston lui répond. 





Common Area of two sectors. 
19961106 

Lynda Mow pose la question : How do I find the area common to two intersecting circles of radii 8 ft and 10 ft if their common chord is 10 ft long? Penny Nom lui répond. 

