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What is the area of this circle? (Express your answer using π.)
(Note: The diameter is 10ft.)

2 Answers

5 votes
Area of a circle is:

A = pi * r^2

If the diameter is 10 feet, the radius will be half of that or 5.

So:

A = 3.14 * 5^2

Simplify exponent:

A = 3.14 * 25

Multiply:

A = 78.5
User Ganesh Pokale
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6 votes
The area is πr².
The radius r is half the diameter. The diameter is 10 ft so the radius is 5 ft.


A=\pi * 5^2=25 \pi

The area is 25π ft².
User Understanding
by
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