Math, asked by saanvibidhuri, 3 months ago

find the unknown marked angles

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Answered by itzwhitedevil

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$\angle \: abc = 180 -\angle \: abe\\ (exterior \: angle \: property \: of \triangle) \\ \angle \: ab = 180 - 110 = 70 \degree \\ ab = ac \\ therefore \: \angle \: abc = \angle \: acb \\ ( \angle \: opp. \: to \: equal \: side \: of \: a \triangle) \\ \angle \: abc + \angle \: acb + \angle \: y = 180(angle \: sum \: of \triangle) \\</p><p>\angle y=180-140=40° \\ \angle x=180-70=110°$

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