Question

False. All rhombuses must have 4 equal sides, but do not have to have 90 degree angles.

Answer 1

A triangle is a three-sided figure lying on a plane with three angles adding up to 180 degrees.

Step-by-step explanation:

A triangle is a three-sided figure lying on a plane with three angles adding up to 180 degrees.

Therefore, if you are thinking of a triangle, it must have three angles totaling 180 degrees.