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Remember the equation for the area of a circle.
A = pi r^(2)
To find 'r' algebrucally rearrange
r^(2) = A/pi
Do not forget to Square Root BOTH sides
r = sqrt(A/pi)
r = sqrt(345 / 3.141592....) )
r = sqrt(109.8169107....)
r = 10.47935641... cm ~ 10.5 cm
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Earn +20 ptsQ: What is the radius of a circle with area 345 square centimetres?
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