SOLUTION: Sean drew a circle with an area of 254.34 square centimeters.What is the diameter of Sean's circle.

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Question 443139: Sean drew a circle with an area of 254.34 square centimeters.What is the diameter of Sean's circle.
Found 2 solutions by rwm, Gogonati:
Answer by rwm(914) About Me  (Show Source):
Answer by Gogonati(855) About Me  (Show Source):
You can put this solution on YOUR website!
As you know the area of the circle given by the formula:A=%28pi%29r%5E2, where r
is the radius of the circle.Substitute and get:254.34=3.14%2Ar%5E2 =>
r=sqrt%28254.34%2F3.14%29, and D=2r=2%2Asqrt%2881%29=2%2A9=18+cm+, where D is the
diameter of the circle.