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# If O is the center of the circle above, what is the circumference of

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Math Expert
Joined: 02 Sep 2009
Posts: 53063
If O is the center of the circle above, what is the circumference of  [#permalink]

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15 Dec 2017, 01:06
00:00

Difficulty:

5% (low)

Question Stats:

95% (00:16) correct 5% (00:00) wrong based on 29 sessions

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If O is the center of the circle above, what is the circumference of the circle?

(A) 4π
(B) 8π
(C) 16π
(D) 32π
(E) 64π

Attachment:

2017-12-15_1258_002.png [ 8.01 KiB | Viewed 474 times ]

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Re: If O is the center of the circle above, what is the circumference of  [#permalink]

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15 Dec 2017, 01:10
Using the Distance formula ->
Radius -> √[(0-0)^2 + 90+4)^2] => 4 units.
Diameter => 2*radius => 8 units.

Circumference -> π*D => π* 8 => 8π units.

Smash that B.

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Re: If O is the center of the circle above, what is the circumference of   [#permalink] 15 Dec 2017, 01:10
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# If O is the center of the circle above, what is the circumference of

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