Question

What is the area of the half circle below?

Answer 1

Explanation:

The area of Circle is
`\pi r^(2)`

So, the area of half circle is
`(\pi r^(2) )/(2)`

Diameter is given = 8cm

so radius will be 4 cm

`A = (\pi 4^(2) )/(2) \\A = (\pi 16)/(2) \\A = 8\pi`

A = 8 × 3.14

A = 25.12cm Square

Answer 2

25.12cm

Explanation:

The area of a circle is (π) x (radius)^2.

Here, you are given the diameter.

To find the radius, divide the diameter by 2, which results in 4.

(π) x (4)^2

Now square the 4, which results in 16

3.14 x 16 = 50.24

50.24 would be the area of the circle not cut in half, so divide 50.54 by 2 to get half.

50.24/2 = 25.12