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Simplifying
706.5 = 3.14r2
Solving
706.5 = 3.14r2
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Add '-3.14r2' to each side of the equation.
706.5 + -3.14r2 = 3.14r2 + -3.14r2
Combine like terms: 3.14r2 + -3.14r2 = 0.00
706.5 + -3.14r2 = 0.00
Add '-706.5' to each side of the equation.
706.5 + -706.5 + -3.14r2 = 0.00 + -706.5
Combine like terms: 706.5 + -706.5 = 0.0
0.0 + -3.14r2 = 0.00 + -706.5
-3.14r2 = 0.00 + -706.5
Combine like terms: 0.00 + -706.5 = -706.5
-3.14r2 = -706.5
Divide each side by '-3.14'.
r2 = 225
Simplifying
r2 = 225
Take the square root of each side:
r = {-15, 15}
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