Question

In triangle ABC ,BC=AB & angle B = 70° angle A is equal to ​

Answer 1

Answer:

Step-by-step explanation:

As b c =ab it is a isoceles triangle

So

A +b+c=180 sum of angles in tri

a+c=110. a=55deg =c

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Answer 2

Step-by-step explanation:

BC=AB

⇒∠A=∠C (As angles opposite to equal side are equal)

let thte angles be x each.

Now by angle sum property

∠A+∠B+∠C=180

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⇒x+80

∘

+x=180

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⇒2x=180

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−80

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⇒2x=100

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⇒x=50

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∴∠A=50

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