Key learning points

1. The formula can be used to calculate the area of a trapezium.
2. The area of a trapezium can be used to calculate a missing side length.
3. It cannot be used to calculate one of the slanted sides.

Keywords

• Trapezium - A trapezium is a quadrilateral with exactly one pair of parallel opposite sides.

• Trapezia/trapeziums - The plural of trapezium can be referred to as trapezia or trapeziums.

Common misconception