500*500=(4*3.14)r^2

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Solution for 500*500=(4*3.14)r^2 equation: 


Simplifying
500 * 500 = (4 * 3.14) * r2

Multiply 500 * 500
250000 = (4 * 3.14) * r2

Multiply 4 * 3.14
250000 = (12.56) * r2

Solving
250000 = 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.
250000 + -12.56r2 = 12.56r2 + -12.56r2

Combine like terms: 12.56r2 + -12.56r2 = 0.00
250000 + -12.56r2 = 0.00

Add '-250000' to each side of the equation.
250000 + -250000 + -12.56r2 = 0.00 + -250000

Combine like terms: 250000 + -250000 = 0
0 + -12.56r2 = 0.00 + -250000
-12.56r2 = 0.00 + -250000

Combine like terms: 0.00 + -250000 = -250000
-12.56r2 = -250000

Divide each side by '-12.56'.
r2 = 19904.4586

Simplifying
r2 = 19904.4586

Take the square root of each side:
r = {-141.083162, 141.083162}

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