Question

In ∆ABC, AB = AC and <B = 50° . Then <A = ?
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Answer 1

Answer:

80°

Step-by-step explanation:

we know that,

ΔABC is an isosceles triangle. (Since,AB=AC)

we also know that,

<B=<C

by angel sum property:

<A+<B+<C=180°

<A+<B+<C=180°<A+2<B=180°

<A+2<B=180°

<A+2(50°)=180°

<A+100°=180°

<A=180°-100°

<A=80°

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