Question

In a angleABC AB=AC If angle B=30degree what is the measure of angleA? ​

Answer 1

Answer:

See the attachment

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Answer 2

Answer:

A+B+C= 180°

(angle sum of property of a ∆)

B=C= 30°

(∆ ABC is an isosceles ∆)

A + 30° +30° = 180°

A + 60° = 180°

A = 120°