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A figure (or shape) that can be divided into more than one of the basic
figures is said to be a composite figure (or shape).
For example, figure ABCD is a composite figure as it consists of
two basic figures. That is, a figure is formed by a rectangle
and triangle
as shown below.
The area
of a composite figure is calculated by dividing the composite
figure into basic figures and then using the relevant area formula
for each
basic figure.
Example 20
Find the area of the following composite figure:
Solution:
The figure can be divided into a rectangle and triangle as shown below.
So, the area of the composite figure is 216 cm2.
Key Terms
composite figure, composite shape
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