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Ne4ueva [31]
3 years ago
12

In triangle ABC AB is equals to AB and Angle B equal to 80 find the angle A​

Mathematics
1 answer:
insens350 [35]3 years ago
4 0

Answer:

∠A = 20°

Step-by-step explanation:

Given:

Line AB equal to line AC

So, we can say that;

∠B = ∠C

So

∠B = ∠C = 80°

Using angle sum rule

∠A + ∠B + ∠C = 180°

∠A + 80° + 80° = 180°

∠A = 20°

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