A triangle is a closed shape with three sides and three vertices. The general formula to calculate the area of a triangle is half of the product of its base and height.

A KS3 Bitesize 11-14 Maths guide showing you how to prove the area of a triangle is half base × height.

8 ÷ 2 = 4 cm 2 The area of a triangle can also be calculated using the formula: area of a triangle = base × height 2 In this case: 2 × 4 2 = 4 cm 2 ...