452.16=4*3.14r^2

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Solution for 452.16=4*3.14r^2 equation: 



452.16=4*3.14r^2

We move all terms to the left:

452.16-(4*3.14r^2)=0

We get rid of parentheses

-4*3.14r^2+452.16=0

Wy multiply elements

-12r+452.16=0

We move all terms containing r to the left, all other terms to the right

-12r=-452.16

r=-452.16/-12

r=37+1.96153846154/2.88461538462

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