63.585=3.14r^2

Solution for 63.585=3.14r^2 equation:

Simplifying
63.585 = 3.14r2

Solving
63.585 = 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.
63.585 + -3.14r2 = 3.14r2 + -3.14r2

Combine like terms: 3.14r2 + -3.14r2 = 0.00
63.585 + -3.14r2 = 0.00

Add '-63.585' to each side of the equation.
63.585 + -63.585 + -3.14r2 = 0.00 + -63.585

Combine like terms: 63.585 + -63.585 = 0.000
0.000 + -3.14r2 = 0.00 + -63.585
-3.14r2 = 0.00 + -63.585

Combine like terms: 0.00 + -63.585 = -63.585
-3.14r2 = -63.585

Divide each side by '-3.14'.
r2 = 20.25

Simplifying
r2 = 20.25

Take the square root of each side:
r = {-4.5, 4.5}