The base is the side which is perpendicular to the height.

The perpendicular height is the perpendicular distance from the base to the opposite vertex.

Area of a triangle

Maths

In this unit pupils learn how to derive and use the formula for the area of a triangle and trapezium. In the future unit, this knowledge is called upon to find the volume of different prisms and area of composite shapes

In this unit, pupils explored the relationship between perimeter and area. In particular, they considered whether a shape can have the same area and perimeter value

Perimeter and area

The perpendicular height is the perpendicular distance from the {{}} to the opposite vertex.

True or false? You can calculate the area of this triangle.

Calculate the area of a triangle with a base of 8 cm and a perpendicular height of 5 cm (you do not need to give the units).

Two identical triangles can always be placed together to create a {{}}

base $$\times$$ perpendicular height $$\times$$ 0.2

base $$\times$$ perpendicular height $$\times {1 \over 2}$$

Which of these is **not** a way to calculate the area of this triangle? 

True or false? In order to calculate the area of a shape, you sum the side lengths of the shape.

This lesson will be removed by end of Summer Term 2025.

Area of a triangle

Lesson outcome

This lesson will be removed by end of Summer Term 2025.