254.34=3.14*r^2

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Solution for 254.34=3.14*r^2 equation: 


Simplifying
254.34 = 3.14r2

Solving
254.34 = 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.
254.34 + -3.14r2 = 3.14r2 + -3.14r2

Combine like terms: 3.14r2 + -3.14r2 = 0.00
254.34 + -3.14r2 = 0.00

Add '-254.34' to each side of the equation.
254.34 + -254.34 + -3.14r2 = 0.00 + -254.34

Combine like terms: 254.34 + -254.34 = 0.00
0.00 + -3.14r2 = 0.00 + -254.34
-3.14r2 = 0.00 + -254.34

Combine like terms: 0.00 + -254.34 = -254.34
-3.14r2 = -254.34

Divide each side by '-3.14'.
r2 = 81

Simplifying
r2 = 81

Take the square root of each side:
r = {-9, 9}

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