43.96=3.14*r^2

Solution for 43.96=3.14*r^2 equation:

Simplifying
43.96 = 3.14r2

Solving
43.96 = 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.
43.96 + -3.14r2 = 3.14r2 + -3.14r2

Combine like terms: 3.14r2 + -3.14r2 = 0.00
43.96 + -3.14r2 = 0.00

Add '-43.96' to each side of the equation.
43.96 + -43.96 + -3.14r2 = 0.00 + -43.96

Combine like terms: 43.96 + -43.96 = 0.00
0.00 + -3.14r2 = 0.00 + -43.96
-3.14r2 = 0.00 + -43.96

Combine like terms: 0.00 + -43.96 = -43.96
-3.14r2 = -43.96

Divide each side by '-3.14'.
r2 = 14

Simplifying
r2 = 14

Take the square root of each side:
r = {-3.741657387, 3.741657387}