The parallel sides of a trapezium are labelled 𝒂 and 𝒃. The perpendicular height is the shortest distance between ... can be looked at as half a parallelogram. The area of a parallelogram ...
WHAT YOU NEED: ruler, scissors, pencil, piece of card. Image caption, STEP 1: Use the ruler and pencil to draw a diagonal line from the bottom left corner of the card to any point on the top edge ...