Trapezoid is a quadrilateral which has at least one pair of parallel sides. It is called Trapezium in Britain and Trapezoid in North America. The trapezoid has 2 sides that are parallel lines.

**Basic properties of Trapezoid:**
- Every trapezoid has two bases

- Every trapezoid have two legs

- The height of the trapezoid is the perpendicular distance from one base to the other

**Trapezium/Trapezoid Formula**:

Area of Trapezium = ½×(a + b)×h

where

a, b = sides, h = height

Perimeter of Trapezium = a + b + c + d

where

a, b, c, d = sides