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Two line segments in the plane 2011-08-15
Tim pose la question :
For this problem I actually have tried to visualise the image in my head many times. This question makes my head spin.

Four points lie in a plane. They are partitioned into two pairs so that the sum of the lengths of the segments joining the points of each pair has the minimal possible value. Prove that these segments have no common points.

Chris Fisher lui répond.
A cyclic quadrilateral 2011-08-15
Tim pose la question :
Hi! I've been working on this for a while and I'm quite stuck. If anyone can help that would be great. The sides BC and AD of a quadrilateral ABCD are parallel. A circle meets the side AB at B and E and the side CD at C and F. Prove that the quadrilateral AEFD is cyclic.
Chris Fisher lui répond.
A sequence 2011-08-14
intesar pose la question :
how do i figure this out 0,1/6,2/9,3/12
Penny Nom lui répond.
The third term of a sequence 2011-08-13
sammantha pose la question :
Find the 3rd term of the sequence, an=1.5(4)n - 1.
Penny Nom lui répond.
A ratio as a fraction in lowest terms 2011-08-12
jonecia pose la question :
write this ratio as a fraction in lowest terms 707days of 112days?
Melanie Tyrer lui répond.
50,000 cubic yards of dirt 2011-08-12
JUDY pose la question :
IF MY HUSBAND HAS A JOB THAT REQUIRES HIM TO MOVE 50,000 CUBIC YARDS OF DIRT, HOW MUCH LAND WOULD THAT COVER AT 1 FOOT DEPTH.
Penny Nom lui répond.
Infinite Logarithmic Series 2011-08-08
Sourik pose la question :
Dear Expert,

In my Amithabha Mitra and Shambhunath Ganguly's "A Text Book of Mathematics" I found the formula of log (1+x) where the base is e and x lies in between -1 and +1.As I want to learn Mathematics,I am not satisfied with the mere statement of the formula.Please help giving me the full proof.
Thanking you,
Sourik

Robert Dawson lui répond.
A concrete octagonal pad 2011-08-04
Tina pose la question :
I have a project where I need to construct a concrete octagonal pad. Each side is 12' and it is 5" deep. Please tell me how to calculate square yards of concrete. Thank you.
Penny Nom lui répond.
A 3 foot circle using 1/2" cord 2011-08-04
Cindy pose la question :
To make a 3 foot circle using 1/2" cord - how many lineal feet of cord do I need?
Robert Dawson lui répond.
A lock box 2011-08-03
Tom pose la question :
I need to open a lock box from my parent's estate. The combination is a simple 4 number lock. The last two numbers are 33. Numbers can be used more than once.What are the possible combinations? WP
Harley Weston lui répond.
Ben's favourite numbers 2011-08-03
Luke pose la question :
Ben challenges you to guess his favourite numbers by using the following three clues: -Each number is a four-digit odd number. -Each is a palindrome -The digits of each number add up to 10 -None of the numbers are divisible by 5
Robert Dawson lui répond.
A cone with an oval as a base 2011-08-03
Emily pose la question :
Hi, I was wondering how to calculate the surface area of a cone with an oval as a base (which I think is referred to as an elliptic cone or something like that). I have the both the maximum and minimum radius as well as the height, but I don't have a slant height and I'm not sure how to calculate it and then calculate surface area. I would really appreciate some help. Thanks!
Robert Dawson lui répond.
A point on a circle 2011-08-02
George pose la question :
I know the center location (x,y) of the circle, I know the radius of the circle, I know the location (X,Y) of one point on the circle, and I know the angle (in degrees not radians) between the known point location (X,Y) and an unknown point location (let's call it (A,B) for reference). What formula(s) can I use to find out the coordinate position of (A,B)?
Chris Fisher lui répond.
A trapezoid 2011-08-02
Nazrul pose la question :
How can I draw a trapezoid whose parallel sides and other two sides are given.
Chris Fisher lui répond.
An equation in the form Ax+By=C 2011-07-28
Mike pose la question :
I need to write an equation in the form Ax+By=C The points I was given are (5,0) and (-3,5)

I know how to find the slope I got -5/8 and wrote it out as y=(-5/8)x+b however I'm not quite sure where to go from here.
Any help would be greatly appreciated.

Penny Nom lui répond.
 
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