Areas & Perimeters

A compound shape is made up of two or more simple shapes joined together. To find the total area, split the compound shape into rectangles, triangles, or other familiar shapes, calculate each area separately, and add them up.

Explore the units used to measure length, mass, time, and volume, and practise converting between them using the correct conversion factors.

Formulas for the area and perimeter of a parallelogram with worked examples.

Formulas for the area and perimeter of a rectangle, including worked examples.

Formula cards for the area and perimeter of all common 2D shapes.

Formulas for the area, perimeter, and diagonal of a square, with worked examples.

Formulas for the area and perimeter of a trapezoid with worked examples.

How to calculate the area and perimeter of triangles using base-height and Heron's formula.