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13 Aug 2019, 03:28
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If O is the center of the circle above, what fraction of the circular region is encompassed by an angle of x degrees?
A. 1/36
B. 1/12
C. 1/9
D. 1/6
E. The answer cannot be determined from the given information.
Attachment:
image496.png [ 4.46 KiB | Viewed 2254 times ]
13 Aug 2019, 09:13
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Bunuel
If O is the center of the circle above, what fraction of the circular region is encompassed by an angle of x degrees?
A. 1/36
B. 1/12
C. 1/9
D. 1/6
E. The answer cannot be determined from the given information.
Attachment:
image496.png
If O is the center of the circle above, what fraction of the circular region is encompassed by an angle of x degrees?
12x = 1
x=1/12
IMO B
shuvodip04
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26 Sep 2019, 11:26
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Bunuel
If O is the center of the circle above, what fraction of the circular region is encompassed by an angle of x degrees?
A. 1/36
B. 1/12
C. 1/9
D. 1/6
E. The answer cannot be determined from the given information.
Attachment:
The attachment image496.png is no longer available
The angles marked in red are vertically opposite angles hence equal. Sum of all angles = 12x
Therefore the required fraction = x/12x =1/12 (B)
Attachments
Untitled.jpg [ 18.33 KiB | Viewed 1844 times ]
