Question

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

Answer 1

area=pi*r^2
circumference=2*pi*r
where r is the radius

Answer 2

pir^2=452.16
r^2 =452.16/pi
=452.16/3.146
=144
r =12
circumference of a circle 2pir =2pi*12
=24pi
=24*3.146
=75.5 m

Source: http://www.mathskey.com/question2answer/

Answer 3

Thanks guys! This is really helping me to review for an upcoming test :)