Question

What are the four properties of parallelograms?

Answer 1

Opposite sides are parallel by definition
Opposite sides are congruent
opposite angles are congruent
consecutive angles are supplementary
The diagonals bisect each other

Answer 2

There are six important properties of parallelograms to know:

Opposite sides are congruent (AB = DC).Opposite angels are congruent (D = B).Consecutive angles are supplementary (A + D = 180°).If one angle is right, then all angles are right.The diagonals of a parallelogram bisect each other.Each diagonal of a parallelogram separates it into two congruent triangles.