Question

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

• A. Adjacent sides are equal.
• B. Only one pair of opposite sides are to be parallel.
• C. It's opposite sides are equal and parallel.
• D. The diagonals bisect each other at ${90}^{\circ }$

Answer 1

The correct option is C It's opposite sides are equal and parallel.

Parallelogram is a quadrilateral in which both pairs of opposite sides are parallel.
Opposite sides of a parallelogram are equal.