What is the area of a circle with a diameter of 15m?

1 Answer
Sep 30, 2015

Use the formula A=pi*r^2A=πr2

Area=56.25*pi56.25π mm or 225/4*pi2254π mm or approximately 176.7176.7 mm

Explanation:

The formula for the area of a circle is A=pi*r^2A=πr2, where AA is the area and rr is the radius

The radius if half the diameter, so

r=1/2*dr=12d

r=1/2*15mr=1215m

r=7.5mr=7.5m

Therefore,

A=pi*r^2A=πr2

A=pi*(7.5)^2A=π(7.5)2

A=56.25*piA=56.25π mm or A~~176.7A176.7 mm (correct to 1 decimal place)