Subject: math
Name: melinda
Who are you: Student

IF THE RADIUS OF A SEMI-CIRCLE IS 9FT. WHAT IS THE AREA

Hi Melinda.

A semi-circle is half of a circle and the area of a circle of radius r is r².

Penny

Hello Melinda

We know that the area of a circle is:

area of a circle = r²

A semi-circle is half of a circle. Therefore the area of a semi-circle will be:

area of a semi-circle = 1/2 r²

We know that the radius is 9ft. Pi is approximately 3.14 or 22/7.

Now you just have to plug in the numbers and you will find the area!

Karen