Trapezoid (Trapezium)

Exactly one pair of parallel sides.

A quadrilateral with exactly one pair of parallel sides — the bases.

Drag the corners

trapezoid

area ≈ 100.3 sq units

Area

A = \frac{1}{2} (b_{1} + b_{2}) \times h

In British English this shape is called a 'trapezium'. In American English, 'trapezoid'.