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Ex 6.2, 2 - Find the value of unknown interior angle x in the figures

 

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Ex 6.2, 2 Find the value of the unknown interior angle x in the following figures: (i) In ∆ABC, ∠ACD = 115°, ∠A = 50°, ∠B = x We know that, Exterior angle is sum of interior opposite angles ∠ACD = ∠A + ∠B 115° = 50° + x 115° − 50° = x 65° = x x = 65°

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