1519.76=3.14*r^2

Solution for 1519.76=3.14*r^2 equation:

Simplifying
1519.76 = 3.14r2

Solving
1519.76 = 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.
1519.76 + -3.14r2 = 3.14r2 + -3.14r2

Combine like terms: 3.14r2 + -3.14r2 = 0.00
1519.76 + -3.14r2 = 0.00

Add '-1519.76' to each side of the equation.
1519.76 + -1519.76 + -3.14r2 = 0.00 + -1519.76

Combine like terms: 1519.76 + -1519.76 = 0.00
0.00 + -3.14r2 = 0.00 + -1519.76
-3.14r2 = 0.00 + -1519.76

Combine like terms: 0.00 + -1519.76 = -1519.76
-3.14r2 = -1519.76

Divide each side by '-3.14'.
r2 = 484

Simplifying
r2 = 484

Take the square root of each side:
r = {-22, 22}