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Question

Observe the construction and prove that line AC line l Fig. 3.22.

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Solution

Given : Arcs are drawn with same radius.Construction : Join AP, AQ, CP and CQ.In APO and AQO,AP = AQ (arc drawn with constant radius)PO =QO (arc drawn with constant radius) AO = AO (common)APO AQO (SSS test)Thus, AOP = AOQ By c.a.c.tSince AOP +AOQ = 180°, 2AOP = 180°AOP = 90° = AOQTherefore, line AC line l


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