In given figure , if AB= …
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Posted by . . 4 years, 2 months ago
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Gaurav Seth 4 years, 2 months ago
AB = AC
Therefore, ∠B =∠C ( Angles Opposite to equal sides are equal )
∠A+∠B+∠C = 180° (Angle Sum Property)
or, ∠A+50°+50° = 180°
or, ∠A+100° = 180°
or, ∠A = 180°-100°
or, ∠A=80°
Therefore, ∠A=80°
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