452=4(3.14)r^2

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Solution for 452=4(3.14)r^2 equation: 


Simplifying
452 = 4(3.14) * r2

Multiply 4 * 3.14
452 = 12.56r2

Solving
452 = 12.56r2

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-12.56r2' to each side of the equation.
452 + -12.56r2 = 12.56r2 + -12.56r2

Combine like terms: 12.56r2 + -12.56r2 = 0.00
452 + -12.56r2 = 0.00

Add '-452' to each side of the equation.
452 + -452 + -12.56r2 = 0.00 + -452

Combine like terms: 452 + -452 = 0
0 + -12.56r2 = 0.00 + -452
-12.56r2 = 0.00 + -452

Combine like terms: 0.00 + -452 = -452
-12.56r2 = -452

Divide each side by '-12.56'.
r2 = 35.98726115

Simplifying
r2 = 35.98726115

Take the square root of each side:
r = {-5.998938335, 5.998938335}

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