Question

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

Answer 1

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.