# Trapezoid

### From Conservapedia

A **trapezoid** is a four-sided polygon with two parallel sides.

The following properties arise from the definition:

- Two of the pairs of adjacent angles sum to 180
^{o} - The area is the mean of the parallel sides multiplied by the distance between them.
- The perimeter is equal to the sum of the oblique sides plus the sum of the tangent sides.
- The sum of the oblique angles will be equal to the sum of the tangent angles.