Posted by cici on Sunday, May 20, 2012 at 11:16pm.
A = r ^ 2 * pi = 25 in ^ 2
r ^ 2 * pi = 25 Divide both sides by pi
r ^ 2 = 25 / pi Take the square root of both sides
r = + OR - sqrt ( 25 ) / sqrt ( pi )
r = + OR - 5 / sqrt ( pi )
Radius can't be negative so :
r = 5 / sqrt ( pi )
r = 5 / sqrt ( 3.1416 )
r = 5 / 1.772456
r = 2.82094 in
thank you(:
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