Quadrilateral

A quadrilateral is a polygon that has four sides, four vertices, and four angles. The sum of the interior angles of a quadrilateral is always 360 degrees.

Types of Quadrilaterals

There are several types of quadrilaterals, including:

• Square: A quadrilateral with four equal sides and four right angles.
• Rectangle: A quadrilateral with four right angles, opposite sides are equal in length, and diagonals are of equal length.
• Parallelogram: A quadrilateral with opposite sides that are parallel and equal in length.
• Rhombus: A quadrilateral with all four sides of equal length.
• Trapezoid: A quadrilateral with exactly one pair of parallel sides.

Properties of Quadrilaterals

Quadrilaterals have various properties, including:

• The sum of the lengths of any two sides of a quadrilateral is greater than the lengths of the other two sides.
• Opposite angles in a quadrilateral are equal.
• The diagonals of some quadrilaterals bisect each other.
• Some quadrilaterals have perpendicular diagonals.