Areas of Rectangles, Parallelograms and Triangles

Remember the following formulae:

Area of a rectangle = length × width

The area of this rectangle is 11cm x 4cm = 44cm²

Area of a parallelogram = length × perpendicular height

The area of this parallelogram is 8cm x 3cm = 24cm²

Area of a triangle = base × perpendicular height ÷ 2

(This is because you can fit two triangles inside a rectangle.)

The area of this triangle is (12cm x 8cm) ÷ 2 = 48cm²