A one-minute video showing you how to prove that the area of trapezium = sum of the parallel sides x height / 2.

The parallel sides of a trapezium are labelled 𝒂 and 𝒃. The perpendicular height is the shortest distance between the parallel sides and is labelled 𝒉. Calculating the area of a trapezium ...

1. Prove that the straight line joining the midpoint of the diagonals of a trapezium is parallel to the parallel sides and is equal to half their difference. 2.