Quadrilaterals

A quadrilateral is a polygon with four sides.

A quadrilateral has two diagonals.

The sum of the interior angles of a quadrilateral equals 360º.


Types of Quadrilaterals

Parallelograms

A parallelogram is a quadrilateral which has parallel sides in pairs. They are classified as follows:

Square

A square has 4 equal sides and 4 right angles.

Square

Rectangle

A rectangle has equal opposite sides and 4 right angles.

Rectangle

Rhombus

A rhombus has four equal sides and equal opposite angles.

Rhombus

Rhomboid

A rhomboid has opposite sides that are parallel and equal.

Rhomboid


Trapezoid

Trapezoids are quadrilaterals with only two parallel sides. They are classified as follows:

Right Trapezoid

A right trapezoid has two right angles.

Right Trapezoid

Isosceles Trapezoid

An isosceles trapezoid has two of its non-parallel sides equal in length.

Isosceles Trapezoid

Scalene trapezoid

A scalene trapezoid doesn´t have equal sides or angles.

Scalene Trapezoid