# Rectangularity of Parallelograms

- Author:
- Judah L Schwartz

- Topic:
- Parallelogram

A rhombus is a parallelogram with perpendicular diagonals that in certain circumstances is a square (and thus a rectangle).
Can you devise a measure of rectangularity of parallelograms that allows you to tell how much more rectangular one parallelogram is than another?
Can you devise a second and different measure of rectangularity of parallelograms? Under what circumstances might one such measure be preferable to the other?
[

*See the "Polygon Explorer" and "Polygon Synthesizer" applets on the***mathMINDhabits**website]