Question

How to measure the area of a half moon

Answer 1

`(\pi r^2)/(2)`

Explanation:

The area of a semicircle is half the area of a circle

The area of a circle is
`\pi r^2`, where r is the radius of the circle, and
`\pi` is a mathematical constant, approximately 3.14. The area of the semicircle is half the area of the circle, or
`(\pi r^2)/(2)`.

Answer 2

Use this formula:

A=(pi•r^2)/4