A circle has a radius of 15 ft. What is its area?

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Answer 1 · 2017-11-30T18:39:51

See a solution process below:

The formula for the area of a circle is:

#A = pir^2#

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Substituting the value from the problem for #r# gives:

#A = pi(15" ft")^2#

#A = pi225" ft"^2#

#A = 225pi" ft"^2#

Approximating 3.14 for #pi# gives:

#A = 225 * 3.14" ft"^2#

#A = 706.5" ft"^2#

The area of the circle is approximately 706.5 square feet.