geometry
posted by Shannon .
Diagonals of an isoseles trapezoid are perpendicular always,sometimes,or never.

What would make them perpendicular?
http://en.wikipedia.org/wiki/Isosceles_trapezoid
posted by Shannon .
Diagonals of an isoseles trapezoid are perpendicular always,sometimes,or never.
What would make them perpendicular?
http://en.wikipedia.org/wiki/Isosceles_trapezoid