find the circumference of a circle whose area is 452.16 square meters.

find the circumference of a circle whose area is 452.16 square meters. (use 3.146 as the value of pie.)
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serkel area=452.16=pi*rad*rad

=3.1415926535...*rad*rad

so rad^2=452.16/3.14159 26535 89793 23846 26433 8327...

=143.92699813639518

rad=sqrt(143.....)=11.9969578700767

or bout 12
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