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	An analytic proof that a quadrilateral is a parallelogram		2020-10-26
		Apollo pose la question : Prove analytically that if ABCD is a parallelogram in which points P and Q trisects the diagonal AC, then BPDQ is a parallelogram. Penny Nom lui répond.
	An exterior angle of a parallelogram		2019-11-29
		A student pose la question : one angle of a parallelogram is four times the measure of the exterior angle adjacent to it. find the interior angles Penny Nom lui répond.
	Is a rectangle a parallelogram?		2018-02-28
		ellie pose la question : is a rectangle a parallelogram? Penny Nom lui répond.
	A parallelogram, a rhombus and a rectangle		2018-02-07
		Sambo pose la question : what do parallelogram, rhombus and rectangle have in common? Penny Nom lui répond.
	The midpoints of the sides of a quadrilateral		2016-02-05
		Andrea pose la question : The segments, joining, in order the midpoints of consecutive sides of a quadrilateral form a parallelogram. Penny Nom lui répond.
	Consecutive angles of a parallelogram		2016-01-28
		Hanna pose la question : The consecutive angles of a parallelogram measures Penny Nom lui répond.
	Parallelogram area		2015-08-04
		Nigel pose la question : To find the area of a parallelogram you multiply the base by the height of the parallogram, the height being determined by an imaginary line drawn at right angles to the base. However if I made a parallelogram with joints at each corner and maipulated it to an upright position where the base and sides were at 90 degrees to each other,, I could then simply multiply the base times the height to get the area. Since the sloping side of the parallelogram does not vary in my imaginary jointed model, why can I not simply multiply the base by the sloping side to get the area in the same way that I multiply the base times the height of a square to find its area ? I cannot find the answer to this on the internet although I have searched. Chris Fisher lui répond.
	A parallelogram inscribed in a circle		2015-02-04
		narendra pose la question : how can we prove that a circular parallelogram is a rectangle? Chris Fisher lui répond.
	Interior angles in a parallelogram		2014-08-30
		xavier pose la question : so, one of my math homework questions requires me to know how to find out how to find the interior angles in a parallelogram, the question is, "how many interior angles does a parallelogram have?" Penny Nom lui répond.
	The area of a parallelogram		2013-11-28
		shivam pose la question : a parallelogram has sides 34 cm and 20 cm .one of its diagonal is 42 cm. calculate its area Harley Weston lui répond.
	A question about a parallelogram		2012-10-14
		Renu pose la question : Question from renu, a parent: ABCD is a parallelogram. BP and DQ are two parallel lines cutting AC at P and Q respectively. prove that BPDQ is a parallelogram Harley Weston lui répond.
	If a parallelogram is a cyclic quadrilateral then it is a rectangle		2012-02-01
		Kim pose la question : Show that if a parallelogram is a cyclic quadrilateral then it is a rectangle. Hint: Observe that in a parallelogram ABCD we always have Triangle ABC is congruent to Triangle CDA. Robert Dawson and Chris Fisher lui répond.
	The rate of change of the area of a parallelogram		2011-04-05
		Gevork pose la question : Let a parallelogram have sides of 8 and 12 and let vertex angle A be decreasing at a rate of 2degrees per minute. Find the rate of change of the area of the parallelogram when angle A equals 30 degrees. Penny Nom lui répond.
	The diagonals of a parallelogram		2011-02-17
		ginger pose la question : Find the diagonals of parallelogram where the the side is 40 and the bottom side is 15. Penny Nom lui répond.
	Pyramids and parallelograms		2010-04-01
		Vivi pose la question : Hi, my name is Vivi, and math teacher is giving a geometry test. I tend to forget how to find the surface area and volume of triangular pyramids and parallelograms. Do you have a way of remembering how to find the surface area? Harley Weston lui répond.
	The sides of a parallelogram		2009-03-17
		Sami pose la question : If ABCD is a parallelogram, prove that line AB is congruent to line CD. Clearly state your reasons and conjectures. Penny Nom lui répond.
	The area of a triangle		2009-01-25
		black pose la question : Explain how the formula for the area of a triangle can be determined by using the formula for the area of a parallelogram. Penny Nom lui répond.
	A quadrilateral with two pairs of congruent sides		2008-12-10
		nicole pose la question : what is the name of a figure that has 2 sides that measure 25 feet each and 2 sides that measure 10 feet each? Robert Dawson lui répond.
	A quadrilateral with exactly 1 pair of parallel sides and no congruent sides		2008-12-10
		alie pose la question : a quadrilateral with exactly 1 pair of parallel sides and no congruent sides is what? Robert Dawson lui répond.
	Symmetries of a parallelogram		2008-11-24
		anisha pose la question : how many lines of symmetry does a parallelogram have. A square and a rect are a parallelogram too. so it is confusing?? pls help Walter Whiteley lui répond.
	A hexagon has 3 parallelograms		2008-07-21
		Stephanie pose la question : A hexagon has 3 parallelograms but I am unsure of how to cut a hexagon into 3 parallelograms. Can you show me what this would look like? Harley Weston lui répond.
	The angles of a parallelogram		2008-06-11
		light pose la question : ABCD is a parallelogram. If angle A. = (4x=17)degrees and angle B. = (3x-5)degrees , what is angle c? Penny Nom lui répond.
	Naming a figure		2008-04-24
		P. pose la question : What is the name of a figure that has 2 sides that measure 25 feet each and 2 sides that measure 10 feet each? Penny Nom lui répond.
	The distance between the sides of a parallelogram		2008-03-30
		jhon pose la question : Calculate the perpendicular distance between AB and DC of a parallelogram. Note: AB and DC are the sides of the parallelogram. Penny Nom lui répond.
	The interior angles of a parallelogram		2008-01-29
		amber pose la question : the measure of one interior angle of a parallelogram is 42 degrees more than twice the measure of another angle. Find the measure of each angle. Penny Nom lui répond.
	The interior angles of a parallelogram		2008-01-28
		steffie pose la question : How do you calculate the interior angle sof a parallelogram? 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 rectangle		2007-07-14
		Sonja pose la question : I was having this discussion with another teacher and we need a third opinion. When you are trying to prove a quadrilateral is a rectangle which method should you use: Prove the shape is a parallelogram by doing slope 4 times by stating that parallel lines have equal slopes. Then proving a right angle by stating that perpendicular lines have negative reciprocal slopes. Doing the slope 4 times and stating that the shape is a rectangle because opposite sides are parallel because of equal slopes and it contains a right angle because of negative reciprocal slopes. I guess the real question is do you have to first state that the shape is a parallelogram? Stephen La Rocque lui répond.
	The law of sines		2007-06-09
		Felicia pose la question : A parallelogram has one side that is 12.0 cm and one angle that is 65°. The shorter diagonal is 25.0 cm. To the nearest tenth of a centimetre, how long is the other side of the parallelogram? Use the sine law. Penny Nom lui répond.
	The interior angles of a parallelogram		2007-02-07
		jenniffeir pose la question : Can a parallelogram have two 45 degree angles and two 75 degree angles? Haley Ess lui répond.
	The diagonals of a parallelogram are mutually bisecting		2007-01-21
		Greta pose la question : I am having trouble proving that the diagonals of a parallelogram are mutually bisecting. Penny Nom lui répond.
	Two consecutive angles of a parallelogram		2007-01-17
		Veronica pose la question : The measures of two consecutive angles of a parallelogram are in the ratio 9:11. Find the measure of each angle. Penny Nom lui répond.
	An angle in a parallelogram		2006-08-13
		Sam pose la question : Parallelogram ABCD has diagonal AC equal in length to side AB. CD is produced to E so that D is between E and C. If angle BAC =30 degrees find the size of angle ADE. Stephen La Rocque lui répond.
	The area of a parallelogram		2006-03-12
		Shayne pose la question : Is there a method of finding the area of a trapezium or/and parallelogram even if the height is not given? Could you also explain how to find the height? Penny Nom lui répond.
	A parallelogram		2004-07-30
		Keith pose la question : I'm a high school student and have been having trouble with this problem , which is based on one pair of parallel sides of a parallelogram: If AD = 6x-5 and BC = 3x+7 find x. Of course both sides have to be equal. Now I know the value of x is 4 So my question is how do you get 4 from the given information. Penny Nom lui répond.
	The area of a parallelogram		2003-04-06
		A student pose la question : Find the area of the parallelogram with vertices (0,0),(7,2),(10,7),(3,5) Penny Nom 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.
	Can a square be considered a rectangle?		2003-02-27
		Carla pose la question : Can a square be considered a rectangle? (since opposite sides are same length and parallel) Would a regular hexagon or octagon be considered a parallelogram since its opposite sides are parallel? or does a parallelogram HAVE to have only 4 sides? Penny Nom lui répond.
	Parallelograms		2002-08-21
		Moorthy pose la question : 11 parallel lines are intersected by another 9 parallel lines.Then how many parallelograms are formed? Walter Whiteley lui répond.
	How can you prove a quadrilateral to be a parallelogram?		2001-03-16
		Joy pose la question : How can you prove a quadrilateral to be a parallelogram? Walter Whiteley lui répond.
	Congruent parts of congruent figures		2000-03-10
		Erica pose la question : Yesterday, I recieved a test problem asking to prove two line segments equal. Here is the problem as I was given it: Given: paralleogram ABCD AE is perpendicular to DB CF is perpendicular to DB Prove: AE is equal to CF I answered the problem as follows: . . . Walter Whiteley lui répond.
	Universal Area		1999-04-08
		Karen Richardson pose la question : I need a formula for area that works for a square, a rectangle, a parallelogram, a trapezoid, and a triangle. Jack LeSage, Chris Fisher and Harley Weston lui répond.
	Circumference and Area		1999-02-16
		Natalie pose la question : finding the circumference of a circle? formula finding the area of a parallelogram? formula Penny Nom lui répond.
	Isosceles trapezoid formula		1998-05-12
		Donna McMullin pose la question : The teacher of Gifted and Talented Math has been trying to locate the formula for anisosceles trapezoid and we can't find it anywhere. Could it be the same formula for that of a parallelogram ? Please advise. Walter Whiteley lui répond.

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