36.2984=4*3.14r^2

Solution for 36.2984=4*3.14r^2 equation:

Simplifying
36.2984 = 4 * 3.14r2

Multiply 4 * 3.14
36.2984 = 12.56r2

Solving
36.2984 = 12.56r2

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-12.56r2' to each side of the equation.
36.2984 + -12.56r2 = 12.56r2 + -12.56r2

Combine like terms: 12.56r2 + -12.56r2 = 0.00
36.2984 + -12.56r2 = 0.00

Add '-36.2984' to each side of the equation.
36.2984 + -36.2984 + -12.56r2 = 0.00 + -36.2984

Combine like terms: 36.2984 + -36.2984 = 0.0000
0.0000 + -12.56r2 = 0.00 + -36.2984
-12.56r2 = 0.00 + -36.2984

Combine like terms: 0.00 + -36.2984 = -36.2984
-12.56r2 = -36.2984

Divide each side by '-12.56'.
r2 = 2.89

Simplifying
r2 = 2.89

Take the square root of each side:
r = {-1.7, 1.7}