Question

In ∆ABC ,BC=AB and <B = 80°.then <A=_________ *



80°

50°

20°

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Answer 1

Answer:

Step-by-step explanation:

120

Answer 2

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$\huge\tt\green{A=50°}$

Step by step explanation:

Given:

BC=AB

<B=80°.

To find:

<A=?

Since, we know that angles opposite to equal sides are equal.

so, <A=<C

Therefore, using Angle sum property(ASP)

<A+<B+<C=180°

<A+80°+<A=180°

2<A=180°-80°

<A=100°/2

<A=50°

Hence, the right answer is 50°.

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