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555-605 (Medium)|   Geometry|      
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JubtaGubar
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In a circle with center O, the measure of arc RS = 132 Updated on: 21 Apr 2012, 02:16
Originally posted by JubtaGubar on 21 Apr 2012, 01:52.
Last edited by Bunuel on 21 Apr 2012, 02:16, edited 1 time in total.
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

25% (medium)

Question Stats:

74% (01:19) correct 26% (01:17) wrong based on 252 sessions

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In a circle with center O, the measure of arc RS = 132 degrees. How many degrees are there in angle RSO?

A. 48
B. 24
C. 22
D. 20
E. 66
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B
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Bunuel
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In a circle with center O, the measure of arc RS = 132 21 Apr 2012, 02:15
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JubtaGubar
Hi, please help to solve this test:

1. In a circle with center O, the measure of arc RS = 132 degrees. How many degrees are there in angle RSO?
(A) 48
(B) 24
(C) 22
(D) 20
(E) 66
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Look at the diagram below:
Attachment:
Circle.png
Circle.png [ 24.83 KiB | Viewed 17160 times ]

Given: <ROS=132 degrees. Now, since RO=SO=radius then triangle RSO is isosceles, so <SRO=<RS0=(180-132)/2=24.

Answer: B.
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JubtaGubar
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In a circle with center O, the measure of arc RS = 132 21 Apr 2012, 10:20
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Bunuel


Look at the diagram below:
Attachment:
Circle.png

Given: <ROS=132 degrees. Now, since RO=SO=radius then triangle RSO is isosceles, so <SRO=<RS0=(180-132)/2=24.

Answer: B.
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Thank you Bunuel!
Shame on me! I just confused the angles... this question is too easy.
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In a circle with center O, the measure of arc RS = 132 23 Oct 2017, 10:25
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