  Math Central - mathcentral.uregina.ca  Quandaries & Queries    Q & Q    Topic: slopes   start over

6 items are filed under this topic.    Page1/1            Is it a rectangle? 2009-10-29 From sefora:The coordinates of the vertices of quadrilaterals are given. Draw each quadrilateral on a grid. Determine whether it is a rectangle (show your work) P(5,1), Q(-4,4), R(-6,-2), S(3,-5)Answered by Penny Nom.     The product of gradients between 2 perpendiculars lines 2009-06-11 From Alister:how do i prove that the product of gradients between 2 perpendiculars lines equal to -1....Answered by Penny Nom.     Proving a quadrilateral is a rectangle 2007-07-14 From Sonja: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?Answered by Stephen La Rocque.     The slopes of the sides of the Great Pyramid 2002-02-09 From Christina:The Great Pyramid is the largest of the Egyptian pryamids. When it was built, it was 481 feet tall and had a square base with 755-foot sides. The pyramid has two different slopes-one along its sides and the other along its edges. Which slope is steeper?Answered by Penny Nom.     Lines in the plane 2001-10-21 From Greg: *If the line with equation 3x-4ky= -16 has y-intercept -2, find k. *Write the equation of the line passing through (2,5) and perpendicular to the line passing through (2,-4) and (6,1) Answered by Penny Nom.     Slopes of curved lines 1999-06-09 From Stephen Ehrler:When one plots the graphs of y=2x, y=3x, y=xx When each of these graphs pass through point (0,1) do they have the same slope? I know they are different lines but is it possable that they have the same slope at point (0,1).Answered by Harley Weston.      Page1/1    Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.    about math central :: site map :: links :: notre site français