Question

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Q18. In AABC, BC = AB and B = 80°. Then _A is equal to:
O 80 degree
O 40 degree
O 50 degree
O 120 degree​

Answer 1

Step-by-step explanation:

50 degree is your answer

Answer 2

Answer:

ANSWER

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

∘

⇒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

∘

answer is 50°