# Trapezoids

The trapezoid or trapezium is a quadrilateral with two parallel sides.

### Types of Trapezoids

#### Right Trapezoid

A right trapezoid has two right angles.

#### Isosceles Trapezoid

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

#### Scalene Trapezoid

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

### Area of a Trapezoid

The area of the trapezoid is equal to the sum of its bases multiplied by its height, divided by two.

#### Oblique Side of a Right Trapezoid

#### Isosceles Trapezoid Height

#### Examples

Calculate the area of the following trapezoid:

Calculate the length of the oblique side of the following right trapezoid:

Find the height of the following isosceles trapezoid:

The perimeter of an isosceles trapezoid is 110 m and the bases are 40 and 30 m. Calculate the area of the trapezoid and the length of the non-parallel sides.