16=3.14r^2

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Solution for 16=3.14r^2 equation: 


Simplifying
16 = 3.14r2

Solving
16 = 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.
16 + -3.14r2 = 3.14r2 + -3.14r2

Combine like terms: 3.14r2 + -3.14r2 = 0.00
16 + -3.14r2 = 0.00

Add '-16' to each side of the equation.
16 + -16 + -3.14r2 = 0.00 + -16

Combine like terms: 16 + -16 = 0
0 + -3.14r2 = 0.00 + -16
-3.14r2 = 0.00 + -16

Combine like terms: 0.00 + -16 = -16
-3.14r2 = -16

Divide each side by '-3.14'.
r2 = 5.095541401

Simplifying
r2 = 5.095541401

Take the square root of each side:
r = {-2.257330592, 2.257330592}

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