How do you work out the area of a triangle?
Area of a triangle
To calculate the area of a triangle, multiply the height by the width (this is also known as the 'base') then divide by 2.
Find the area of a triangle where height = 5 cm and width = 8 cm.
5 × 8 = 40 ÷ 2 = 20
The area is 20cm².