Construction

Quadrilateral

A quadrilateral is a polygon with four sides (edges), four vertices (corners), and four angles. The sum of the interior angles of any quadrilateral is always 360°.

Parallelogram

A parallelogram is a special type of quadrilateral in which both pairs of opposite sides are parallel and equal in length. The opposite angles are also equal, and the diagonals bisect each other.

✅ Every parallelogram is a quadrilateral, but not every quadrilateral is a parallelogram.