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Area of a Composite Figure

Post by natttt
Posted on 2011-01-24 20:11:22
A figure obtained from combining two different figures is called a composite figure and its area, A, is found by adding together the areas of the individual figures.

A = A1 + A2

Example: Find the area of the following composite figure.

A = Area of rectangle + Area of semi-circle
Area of rectangle = lw
Area of semi-circle = 1/2 pi * r^2

So, A = lw + 1/2 pi * r^2
A = 20 * 14 + 1/2 * 22/7 * 7^2
A = 280 + 77 = 357 cm^2

So, the area of this composite figure is 357 cm^2

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