Variable Coordinates of Quadrilaterals March 6, 2013

“a” units long “b” units high Think about the coordinates of a line. What does the x-coordinate represent? What does the y-coordinate represent?

Given the name of the Quadrilateral, use the information about the given points to find the missing points.

square

Trapezoid (r,s) (0,t) (0,0) (r,0) Talk about how “s” is not part of the point we are looking for.

Rectangle (g,h) (0,h) (0,0) (g,0)

A Rectangle centered on the origin. (-a,b) (a,b) (-a,-b) (a,-b)

Parallelogram (b,c) (s+b, c) (s,0) (0,0)

Rectangle with vertices at (e,0) (0,0),and (0,d) (e,d)