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In the, figure A, B and C are points on the circle. What is [#permalink]
19 Mar 2019, 09:36
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In the, figure A, B and C are points on the circle. What is the value of x ? (A) 45 (B) 55 (C) 60 (D) 65 (E) 70
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Re: In the, figure A, B and C are points on the circle. What is [#permalink]
12 Apr 2019, 23:19
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As AO, BO and OC are the radiuses of the same circle, △AOB and △BOC both are isosceles. So, [1st Attachment] ∠OAB=∠ABO=(18075)/2=52.5 and ∠OCB=∠OBC=(18035)/2=72.5 Now, ∠x+∠ABO+∠OBC=180 [Because of being a straight line] So, ∠x=180(∠ABO+∠OBC) =180(52.5+72.5) =180125 =55 So, finally: ∠x=55 Answer: B
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Last edited by sanzidikawsar on 13 Apr 2019, 05:41, edited 2 times in total.



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Re: In the, figure A, B and C are points on the circle. What is [#permalink]
13 Apr 2019, 02:46
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sanzidikawsar wrote: As AO, BO and OC are the radiuses of the same circle, △AOB and △BOC both are isosceles. So,
But is it mentioned that O is the centre of the circle?
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Re: In the, figure A, B and C are points on the circle. What is [#permalink]
13 Apr 2019, 05:48
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pranab01 wrote: sanzidikawsar wrote: As AO, BO and OC are the radiuses of the same circle, △AOB and △BOC both are isosceles. So,
But is it mentioned that O is the centre of the circle? Didn't mention. But I found no way to get the answer. Please share if you think something different..



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Re: In the, figure A, B and C are points on the circle. What is [#permalink]
13 Apr 2019, 07:04
sanzidikawsar wrote: pranab01 wrote: sanzidikawsar wrote: As AO, BO and OC are the radiuses of the same circle, △AOB and △BOC both are isosceles. So,
But is it mentioned that O is the centre of the circle? Didn't mention. But I found no way to get the answer. Please share if you think something different.. I guess not
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Re: In the, figure A, B and C are points on the circle. What is
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