5805.86=3.14r^2

Solution for 5805.86=3.14r^2 equation:

Simplifying
5805.86 = 3.14r2

Solving
5805.86 = 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.
5805.86 + -3.14r2 = 3.14r2 + -3.14r2

Combine like terms: 3.14r2 + -3.14r2 = 0.00
5805.86 + -3.14r2 = 0.00

Add '-5805.86' to each side of the equation.
5805.86 + -5805.86 + -3.14r2 = 0.00 + -5805.86

Combine like terms: 5805.86 + -5805.86 = 0.00
0.00 + -3.14r2 = 0.00 + -5805.86
-3.14r2 = 0.00 + -5805.86

Combine like terms: 0.00 + -5805.86 = -5805.86
-3.14r2 = -5805.86

Divide each side by '-3.14'.
r2 = 1849

Simplifying
r2 = 1849

Take the square root of each side:
r = {-43, 43}