3. State giving reason whether AB || CDAC60°120° – InterviewSolution

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3. State giving reason whether AB || CDAC60°120°

Answer»

angle CSR = angle DSQ = 120° ... ( vertically opposite angles)

also, angle ARS + angle RSC = 60+120 = 180° ..making its adjacent angles..

and since the sum is 180 .. so, AB || CD

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