Question

in a triangle abc angle A = 100 degree AB = AC find Angle B and angle C​

Answer 1

Given

ABC is a isosceles triangle (two side are equal)

Angle BAC = 100°

let angle ABC be X

so angle ACB = X (since two side is equal so it's opposite angle of side is equal )

Sum of all angle of a triangle = 180°

X + X + 100° = 180°

2x = 80°

X = 40°

so angle B and C is 40°

Answer 2

Answer

Hope it helps you ☺️