Asemi circle has a radius of 5cm. what is the area of the semi circle? use 3.14 for pi. a.) 15.70 b.) 31.40 c.) 39.25 d.) 78.50

Hello!

We know that the formula for area of a circle is:

A = pi × r^2

A semi circle is half of a circle, which means that its formula would be have of a circles as well.

Formula for area of a semi circle:

A = (pi × r^2) / 2

We'll use the same formula for a semi circle, only we'll divide it by 2 since it's a half circle.

A = (pi × r^2) / 2

A = (3.14 × r^2) / 2

A = 78.5 / 2

A = 39.25

ANSWER:

The area of the semi circle is C.) 39.25 centimetres squared.