50.24=3.14*r^2

Solution for 50.24=3.14*r^2 equation:

Simplifying
50.24 = 3.14r2

Solving
50.24 = 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.
50.24 + -3.14r2 = 3.14r2 + -3.14r2

Combine like terms: 3.14r2 + -3.14r2 = 0.00
50.24 + -3.14r2 = 0.00

Add '-50.24' to each side of the equation.
50.24 + -50.24 + -3.14r2 = 0.00 + -50.24

Combine like terms: 50.24 + -50.24 = 0.00
0.00 + -3.14r2 = 0.00 + -50.24
-3.14r2 = 0.00 + -50.24

Combine like terms: 0.00 + -50.24 = -50.24
-3.14r2 = -50.24

Divide each side by '-3.14'.
r2 = 16

Simplifying
r2 = 16

Take the square root of each side:
r = {-4, 4}