320=3.141592654r^2

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Solution for 320=3.141592654r^2 equation: 


Simplifying
320 = 3.141592654r2

Solving
320 = 3.141592654r2

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-3.141592654r2' to each side of the equation.
320 + -3.141592654r2 = 3.141592654r2 + -3.141592654r2

Combine like terms: 3.141592654r2 + -3.141592654r2 = 0.000000000
320 + -3.141592654r2 = 0.000000000

Add '-320' to each side of the equation.
320 + -320 + -3.141592654r2 = 0.000000000 + -320

Combine like terms: 320 + -320 = 0
0 + -3.141592654r2 = 0.000000000 + -320
-3.141592654r2 = 0.000000000 + -320

Combine like terms: 0.000000000 + -320 = -320
-3.141592654r2 = -320

Divide each side by '-3.141592654'.
r2 = 101.8591636

Simplifying
r2 = 101.8591636

Take the square root of each side:
r = {-10.092530089, 10.092530089}

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