Question

Find the area of the semicircle.

Either enter an exact answer in terms of \piπpi or use 3.143.143, point, 14 for \piπpi and enter your answer as a decimal.

Answer 1

The area of semi-circle is 2π units²

Explanation:

Given that the formula of area of circle is, Area = π×r² where r represents radius of circle. Then, you have to substitue the value of radius into the formula :

Let r = 2 units,

A = π×2²

= 4π units²

The question says it is a semi-circle so you have to divide it by 2 :

A = 4π ÷ 2

= 2π units²

Answer 2

Area of a Semi Circle: (pi x r^2)/2

3.14 x 2^2

3.14 x 4 = 12.56

12.56/2 = 6.28

Therefore, the area of a semi-circle is 6.28.