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

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asked Aug 15, 2023 182k views

1 Answer

Melon · Answer 1 · 2023-08-18T22:50:07+0000

We find its area as follows:

$A=(1)/(2)\pi r^2$

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

$A=(1)/(2)\pi(9)^2\Rightarrow A=(81)/(2)\pi\Rightarrow A\approx127.23$

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