Question

What is the necessary condition for a quadrilateral to be a parallelogram?

• A. A diagonal divides it into two congruent triangles
• B. It has opposite sides parallel
• C. It has adjacent sides equal
• D. The diagonals bisect each other at

Answer 1

The correct option is C It has adjacent sides equal

Parallelograms have opposite sides equal and parallel.

There are six important properties of parallelograms to know:

1. Opposite sides are congruent.
2. Opposite angels are congruent.
3. Consecutive angles are supplementary.
4. If one angle is right, then all angles are right angles.
5. The diagonals of a parallelogram bisect each other.
6. Each diagonal of a parallelogram separates it into two congruent.