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Question Number 19699 by Tinkutara last updated on 14/Aug/17
LetSbeacirclewithcentreO.AchordAB,notadiameter,dividesSintotworegionsR1andR2suchthatObelongstoR2.LetS1beacirclewithcentreinR1,touchingABatXandSinternally.LetS2beacirclewithcentreinR2,touchingABatY,thecircleSinternallyandpassingthroughthecentreofS.ThepointXliesonthediameterpassingthroughthecentreofS2and∠YXO=30°.IftheradiusofS2is100thenwhatistheradiusofS1?
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