32.9=3.14*r^2

Solution for 32.9=3.14*r^2 equation:

Simplifying
32.9 = 3.14r2

Solving
32.9 = 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.
32.9 + -3.14r2 = 3.14r2 + -3.14r2

Combine like terms: 3.14r2 + -3.14r2 = 0.00
32.9 + -3.14r2 = 0.00

Add '-32.9' to each side of the equation.
32.9 + -32.9 + -3.14r2 = 0.00 + -32.9

Combine like terms: 32.9 + -32.9 = 0.0
0.0 + -3.14r2 = 0.00 + -32.9
-3.14r2 = 0.00 + -32.9

Combine like terms: 0.00 + -32.9 = -32.9
-3.14r2 = -32.9

Divide each side by '-3.14'.
r2 = 10.47770701

Simplifying
r2 = 10.47770701

Take the square root of each side:
r = {-3.236928638, 3.236928638}