. centre de ressources dilemmes et doutes le visage humain de mathématiques Qui sommes-nous Problème de mois activités de promotion babillard
Centrale des maths - centraledesmaths.uregina.ca
Dilemmes & doutes
« D & D »
. .
topic card  



liste de
. .
nouvelle recherche

33 articles trouvés pour ce sujet.
Is every rectangle a rhombus? 2016-11-28
Robert pose la question :
not every rectangle is a rhombus.true or false? if false please leave a short explanation. thank you:)
Penny Nom lui répond.
A bus trip 2015-12-15
Michelle pose la question :
I do not know what equation(s) should be used in order to obtain the answer(s) to this word problem.

A bus was rented for a trip, the cost was dived equally amongst the passengers. During the trip, someone mentioned that if there were 9 more passengers, they would have paid each 5$ less. Another mentioned that if there were 6 less passengers, they would have each paid 5$ more. What is the cost of renting the bus and how much must each passenger pay.

Penny Nom lui répond.
The diagonal of a rhombus 2015-11-14
Om pose la question :
In a rhombus ABCD, angle A=60° and side AB=6 cm. Then diagonal BD is ?
Penny Nom lui répond.
Why is the area of square not conserved when it changes to a rhombus? 2015-06-28
shubham pose la question :
Why is the area of square not conserved when it changes to a rhombus, both have equal sides still rhombus have less area than square.??
Penny Nom lui répond.
Is a rhombus a square? 2015-03-24
Justin pose la question :
Is a rhombus a square?
Penny Nom lui répond.
A car passing a bus 2014-08-24
Athish pose la question :
the driver of the car is travelling at 36 km/hr and spots a bus 80 m ahead of him after 1 hr the bus is 120 m behind the car what is the speed of the bus
Penny Nom lui répond.
25% profit 2014-01-02
Finn pose la question :
The question is all about buy-and-sell business.
Pencil - $6 for whole sale price
     $8 if I sell the item How do I get the 25% profit? (you can change the whole sale price and the retail price[if i sell the item])
if I buy the pencil at 24 pieces and sell it at 24 pieces.

Penny Nom lui répond.
Proportional rates 2013-10-10
Varsha pose la question :
A province's Ministry of Social services has found that both the number of people needing social assistance and the province's total expenditures on social assistance are proportional to the rate of unemployment. Last August when the provincial unemployment rate was 8.4 %, the province provided assistance to 89,300 individuals at a total cost of 4107.4 million. The forecast unemployment rate for next August is 7.9%. How many people can the province expect to need social assistance next August? What amount should the province budget for social assistance in August?
Penny Nom lui répond.
A cyclic rhombus 2013-04-16
Marisa pose la question :
I know that the only rhombus that can be inscribed in a circle is a square, but why is that? I've been racking my brain and the internet for solutions, but have found no logical explainations in relation to the arc degrees and angles. Please help.
Chris Fisher lui répond.
How do I prove that the quadrilateral is a Rhombus? 2010-12-16
Matthew pose la question :
Quadrilateral KLMN has vertices K(2,3), L(7,3), M(4,7) and N(-1,7). How do I prove that the quadrilateral is a Rhombus??
Robert Dawson and Penny Nom lui répond.
Two rhombi 2008-06-12
Malik pose la question :
("rhombus" diagram is attached) ABCD and EJCD are rectangles. EFHG and HIJK are similar rhombus. HIJK is 4times bigger than EFHG. In each rhombus the larger diagonal is double of the smaller one. If AB = 30cm, what is the lenght of the diagonals of the smaller rhombus ?
Penny Nom lui répond.
The perimeter of a rhombus 2008-04-18
susana pose la question :
how do you find the perimeter of a rhombus?
Penny Nom lui répond.
A parallelogram and a rhombus 2008-01-22
miguel pose la question :
i have a problem proving a parallelogram a rhombus.. if a diagonal of a parallelogram bisects an angle of the parallelogram , then its a rhombus prove
Stephen La Rocque and Walter Whiteley lui répond.
Proving a quadrilateral is a rhombus 2007-12-03
Jeanie pose la question :
How do you prove that a quadrilateral is a rhombus because the diagonals of the quadrilateral are perpendicular and bisect each other using the 2-column proof method?
Stephen La Rocque lui répond.
A rhombus with all right angles 2007-06-29
Rachel pose la question :
Can a rhombus with all right angles still be tagged as a rhombus, or is it then said to be a square?
Stephen La Rocque, Harley Weston and Walter Whiteley lui répond.
More on quadrilateral shape names 2007-05-26
Don pose la question :
If North Americans call a quadrilateral with no parallel sides a trapezium, is a kite merely a special type of trapezium? Can a rhombus be a kite?
Walter Whiteley and Penny Nom lui répond.
A rhombus 2007-03-04
Sally pose la question :
As a kindergarten teacher, I am trying to introduce the term rhombus to my class. What would be the best mathematical, but simple language to use? The diamond shape, which I am trying to label as rhombus, is still "a dimaond" to my kindergarten students. Help!
Steve La Rocque and Diane Hanson lui répond.
A rhombus 2006-12-26
Jose pose la question :
show mathematically that a quadrilateral whose vertices are A(2,1),B(6,-2) C(10,1),and D(6,4) is a rhombus
Penny Nom lui répond.
The area of a rhombus 2006-09-10
Lillian pose la question :
In a rhombus, each side is 14 in. long. Two of the sides form a 60 degree angle. Find the area of the rhombus. Round your answer to the nearest square inch.
Stephen La Rocque lui répond.
School bus reliability - a probability question 2006-04-27
Peggy pose la question :
The school bus arrives at Janet's stop on time on 75% of school mornings. What is the probability it will arrive on time each day in a 5-day week?
Stephen La Rocque lui répond.
Prove that a rhombus' diagonals are perpendicular 2005-10-02
Tania pose la question :
How do you prove that a rhombus' diagonals are perpendicular using the 2 column proof method?
Walter Whiteley lui répond.
A 40% increase in garage space 2004-10-20
Dianna pose la question :
A bus company recently expanded and no longer has enough room in its garage for all of its buses. Twelve of the buses have to be stored outside. If the company decides to increase their garage space by 40%, this will give them enough room for all of their current buses, plus enough room to store another twelve in the future. How many buses does the company own?
Penny Nom lui répond.
Business trip 2003-12-19
Ameer pose la question :
A businnessman drives from Washington, D.C., to Boston, a distance of 442 miles, and then makes the return trip. On the way to Boston, he drives 65 miles per hour, taking an 1-hour rest stop during the drive. After finishing his business in Boston, he make the return trip driving at 60 miles per hour and takes a 45-minute rest stop halfway through the trip. Which leg of the journey, Washington, D.C. to Boston, or Boston to Washington, D.C., takes the longer time?
Penny Nom lui répond.
Symmetries of a rhombus 2003-11-02
Tonia pose la question :
why cant an equal sided rhombus have 3 lines of symmetry? you have one line of symmetry on each of the diagonals, and there should be one vertically on an angle. can you please explain the rules of symmetry to me?
Walter Whiteley lui répond.
Can a square be a rhombus? 2003-03-04
Beth pose la question :
Can a square be a rhombus? Some sources say yes, some say no. Some sources define a rhombus as a quadrilateral and parallelogram with equal sides, but without right angles. Some sources say a square is a special case of a rhombus. Clarity, please!
Walter Whiteley lui répond.
A bus is 60% occupied 2002-11-09
Joe pose la question :
A bus with a seating capacity of 60 people is 60% occupied. At the next stop one-third of the people get off the bus and 3 people get on the bus. The bus is now ___% occupied.
Penny Nom lui répond.
Three problems 2001-10-28
Brenda pose la question :
  1. Joseph is planting bushes around the perimeter of his lawn. If the bushes must be planted 4 feet apart and Joseph's lawn is 64 feet wide and 124 feet long, how many bushes will Joseph need to purchase?

  2. The cost of a long distance phone call is $1.50 for the first two minutes and $0.60 for each additional minute. How much will Maria pay for a 24 minute phone call?

  3. Find the next three numbers in the pattern. 1,3,7,15,31,___,____,___.

Penny Nom lui répond.
Rhombus 2001-07-16
William pose la question :
Calculate the internal angles of a rhombus given measurments of all four sides only.
Walter Whiteley lui répond.
Bush fractals 2000-12-30
Anita Wisecup pose la question :
My son has a report due on fractals. He needs information on bush fractals, but we cannot seem to find anything out about them.
Penny Nom lui répond.
Inscribing a circle in a rhombus 2000-11-16
Jacky pose la question :
A rhombus ABCD is drawn in which the diagonals are 12 and 20 units long. A circle is inscribed in the quadrilateral with the centre of the circle right on the intersection point of the 2 diagonals. The circumference of the circle touches all 4 sides of the rhombus. Is it possible to find the radius of the inscribed circle? If so, how and what is it?
Chris Fisher lui répond.
Rhombuses 2000-11-07
Melissa pose la question :
What in real life is the shape of a rhombus?
Chris Fisher and Walter Whiteley lui répond.
Rhomboid 1999-03-25
Monica Armour pose la question :
I need to see a net of a rhomboid. Where can I find one on the net? Is it like a square paramid with the top chopped off? Help! This has me stumped.
Jack LeSage lui répond.
Show that this construction yields a rhombus. 1996-06-16
LennyB pose la question :
Hello, I have a problem. I doubt you can help me. If you have an isosceles trapezoid, and you connect the midpoints of the four sides of the isosceles trapezoid forming a quadrilateral, how do you prove that it's a rhombus in a 2 column proof??
Penny Nom lui répond.



Centrale des maths reçoit une aide financière de l’Université de Regina et de The Pacific Institute for the Mathematical Sciences.



accueil centre de ressources accueil Société mathématique du Canada l'Université de Regina PIMS