2=3.14r^2

Solution for 2=3.14r^2 equation:

Simplifying
2 = 3.14r2

Solving
2 = 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.
2 + -3.14r2 = 3.14r2 + -3.14r2

Combine like terms: 3.14r2 + -3.14r2 = 0.00
2 + -3.14r2 = 0.00

Add '-2' to each side of the equation.
2 + -2 + -3.14r2 = 0.00 + -2

Combine like terms: 2 + -2 = 0
0 + -3.14r2 = 0.00 + -2
-3.14r2 = 0.00 + -2

Combine like terms: 0.00 + -2 = -2
-3.14r2 = -2

Divide each side by '-3.14'.
r2 = 0.6369426752

Simplifying
r2 = 0.6369426752

Take the square root of each side:
r = {-0.798086884, 0.798086884}