Properties of Quadrilaterals

A quadrilateral is a polygon with four sides, four vertices, and four angles.

A rectangle has opposite sides that are equal and parallel, and all angles are right angles (90 degrees).

A square is a special type of rectangle where all four sides are equal in length.

A parallelogram is a quadrilateral with both pairs of opposite sides that are parallel and equal in length.

A trapezoid is a quadrilateral with at least one pair of parallel sides.

All squares are rectangles, but not all rectangles are squares.

All parallelograms are quadrilaterals, but not all quadrilaterals are parallelograms.

A trapezoid has one pair of opposite sides that are parallel.

All angles in a rectangle are right angles (90 degrees).

In a parallelogram, both pairs of opposite sides are congruent and parallel.