Question

in triangle abc if ab=ac and angle b is 50° then the measurement of angle a is​

Answer 1

Answer:

∠A = 80°

Step-by-step explanation:

Since AB = AC , triangle ABC is an isosceles triangle.

since, ∠B = 50° (given) and AB = AC

∠C = 50° ( In an isosceles triangle, base angles are equal) & (angles opposite to equal sides are also equal)

∴ ∠A = 180° - ( ∠B + ∠C ) = 180° - ( 50° + 50° ) = 180° - 100° = 80°

∠A = 80°

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