2.46=3.14r^2

Solution for 2.46=3.14r^2 equation:

Simplifying
2.46 = 3.14r2

Solving
2.46 = 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.
2.46 + -3.14r2 = 3.14r2 + -3.14r2

Combine like terms: 3.14r2 + -3.14r2 = 0.00
2.46 + -3.14r2 = 0.00

Add '-2.46' to each side of the equation.
2.46 + -2.46 + -3.14r2 = 0.00 + -2.46

Combine like terms: 2.46 + -2.46 = 0.00
0.00 + -3.14r2 = 0.00 + -2.46
-3.14r2 = 0.00 + -2.46

Combine like terms: 0.00 + -2.46 = -2.46
-3.14r2 = -2.46

Divide each side by '-3.14'.
r2 = 0.7834394904

Simplifying
r2 = 0.7834394904

Take the square root of each side:
r = {-0.885121173, 0.885121173}