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OpenStudy (anonymous):
Find the area of a circle with diameter 18 ft.
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OpenStudy (unklerhaukus):
the area of a circle equals pi times the radius squared. the radius is half the diameter.
OpenStudy (anonymous):
radius would be 9 ?
OpenStudy (anonymous):
Yes, radius is half of diameter.
OpenStudy (anonymous):
so... how would I find the area of the circle?
OpenStudy (anonymous):
Square the radius and multiply by pi. 9^2 * 3.14159
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OpenStudy (anonymous):
81 * 3.14159 = 254.46879 ?
OpenStudy (unklerhaukus):
yes.
OpenStudy (anonymous):
Thanks(:
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