Answered

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A house addition is in the shape of a semicircle (a half-circle) with a radius of 9 ft. What is itsarea?

Sagot :

We find its area as follows:

[tex]A=\frac{1}{2}\pi r^2[/tex]

[This is the equation for the area of a circle divided by 2] Now, we replace the radius:

[tex]A=\frac{1}{2}\pi(9)^2\Rightarrow A=\frac{81}{2}\pi\Rightarrow A\approx127.23[/tex]

So, the area of the semi-circle is approximately 127.23 squared feet.

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