Question

BC is the diameter of the semicircle. The area of rectangle ABCD is 20 and the length of line AB is 5.What is the area of the semicircle?

Answer 1

2
`\pi`
`units^(2)`

Explanation:

BC is equal to 4 because 5*4=20.

The radius is 2. The equation for the area of a circle is
`\pi r^2`.

Therefore, if we plug in 2 we will get
`4\pi`.

But then we divide by 2 to get 2
`\pi`
`units^(2)` as our answer.

Hope this helped! :)