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# If the radius of the circle with centre O is 7 and the measure of angl

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Math Expert
Joined: 02 Sep 2009
Posts: 46991
If the radius of the circle with centre O is 7 and the measure of angl [#permalink]

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18 May 2016, 02:12
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Difficulty:

25% (medium)

Question Stats:

70% (01:04) correct 30% (01:00) wrong based on 139 sessions

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If the radius of the circle with centre O is 7 and the measure of angle AOB is 100, what is the best approximation to the length of arc AB ?

A. 9
B. 10
C. 11
D. 12
E. 13

Attachment:

p004-10.gif [ 647 Bytes | Viewed 5077 times ]

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Re: If the radius of the circle with centre O is 7 and the measure of angl [#permalink]

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18 May 2016, 03:54
The arc length : 14 π * (100/360) = 12
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If the radius of the circle with centre O is 7 and the measure of angl [#permalink]

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18 May 2016, 08:23
1
Bunuel wrote:

If the radius of the circle with centre O is 7 and the measure of angle AOB is 100, what is the best approximation to the length of arc AB ?

A. 9
B. 10
C. 11
D. 12
E. 13

Attachment:
p004-10.gif

Measure of the arc =$$\frac{θ}{360} * 2π * r$$

Measure of the arc = $$\frac{100}{360} * 2 *\frac{22}{7}* 7$$

Measure of the arc = 12

Hence answer will be (D) 12
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Re: If the radius of the circle with centre O is 7 and the measure of angl [#permalink]

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18 May 2016, 10:48
Arc AB / 2 Pi r = 100 / 360 => Arc AB = 12
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Re: If the radius of the circle with centre O is 7 and the measure of angl [#permalink]

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24 Nov 2017, 06:34
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Re: If the radius of the circle with centre O is 7 and the measure of angl   [#permalink] 24 Nov 2017, 06:34
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