This section introduces the formula for the area of a triangle, which can be seen below.
The height is called the perpendicular height because it is at a right-angle to the base.
Below is an example of the formula being used to find the area of a triangle.
Practice Questions Work out the answer to each of these questions then click on the button marked to see whether you are correct.
What is the area of triangle A?
What is the area of triangle B?
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Question 1
Find the area of each of these triangles.
Question 2
Find the areas of the shapes below.
In each case, you will need to divide the shape into one rectangle and one triangle, then add the areas together.
Dashed lines have been included on each shape to help you with this.
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