Jack

10-10-2013, 10:52 AM

What is the area, of a circle with a circumference of 12\pi?

(A) 12\pi

(B) 24\pi

(C) 36\pi

(D) 144\pi

Thanks!

(A) 12\pi

(B) 24\pi

(C) 36\pi

(D) 144\pi

Thanks!

View Full Version : area circumference of a circle

Jack

10-10-2013, 10:52 AM

What is the area, of a circle with a circumference of 12\pi?

(A) 12\pi

(B) 24\pi

(C) 36\pi

(D) 144\pi

Thanks!

(A) 12\pi

(B) 24\pi

(C) 36\pi

(D) 144\pi

Thanks!

miranda

10-10-2013, 10:53 AM

The circumference is given by the formula C=2\pi r=12\pi \Rightarrow r= 6 /units/

The area is given by the formula A=\pi r^2=\pi (6)^2=36 \pi /units/ ^{2}

Therefore the correct answer is (C).

Hope these help!

The area is given by the formula A=\pi r^2=\pi (6)^2=36 \pi /units/ ^{2}

Therefore the correct answer is (C).

Hope these help!

Jack

10-10-2013, 10:53 AM

Thank you!

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