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 is a ...

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. What is a quadrilateral? A quadrilateral is a four-sided shape where ...