Given a rhombus that is not a rectangle, what's the probability of 2 randomly chosen angles being congruent?
1 Answer
Nov 27, 2015
A rhombus has two pairs of angles (the ones opposite each other) congruent, and if it's not rectangular, the other pairs aren't congruent.
There are 6 ways to randomly choose two angles, and 2 of those pairs of angles are congruent, so the probability is
