Asked by Anonymous

which of the following have congruent diagonals?
square
rhombus
parallelogram
rectangle

i believe the answer is the square and rectangle.
Answered by Angie
I think so too.
Answered by Anonymous
what about a parallelogram?
Answered by Angie
Only rectangles (squares included) have congruent diagonals, because all their angles are congruent (90 degrees). If you have angles larger or smaller than 90 degrees it makes the diagonals different lengths.

Answered by Anonymous
oh yeah, that's right. Thank you very much!