Mark M. answered • 08/15/19

Retired Math prof. Experienced Math Regents tutor.

Since the circumference is 18π, 2πr = 18π

2r = 18. So, r = 9

Area = πr^{2} = 81π ≈ 254.47 m

Noah A.

asked • 08/14/19
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Mark M. answered • 08/15/19

Retired Math prof. Experienced Math Regents tutor.

Since the circumference is 18π, 2πr = 18π

2r = 18. So, r = 9

Area = πr^{2} = 81π ≈ 254.47 m

Sam Z. answered • 08/14/19

Math/Science Tutor

area of a circle is r^2pi.

circ " " dpi

18n/pi=5.73n

(2.864n)^2*3.14=8.207n*3.14=25.783n

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