In traiangle ABC if AB=BC and angle b is70 find angle A

1.	In traiangle ABC if AB=BC and angle b is70 find angle A
Answer» Answer: Given: In a Δ ABC, AB = AC and ∠B = 70° ∠B = ∠C [Angles OPPOSITE to EQUAL SIDES are equal] Therefore, ∠B = ∠C = 70° Sum of angles in a triangle = 180° ∠A + ∠B + ∠C = 180° ∠A + 70° + 70° = 180° ∠A = 180° – 140° ∠A = 40°

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Answer:

Given: In a Δ ABC, AB = AC and ∠B = 70° ∠B = ∠C [Angles OPPOSITE to EQUAL SIDES are equal] Therefore, ∠B = ∠C = 70° Sum of angles in a triangle = 180° ∠A + ∠B + ∠C = 180° ∠A + 70° + 70° = 180° ∠A = 180° – 140° ∠A = 40°

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In traiangle ABC if AB=BC and angle b is70 find angle A

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