Question

In ∆ABC, Angle A = 100° and AB = AC. Find Angle B and C.​

Answer 1

ʜᴇʏᴀ ᴍᴀᴛᴇ ʜᴇʀᴇ ɪs ʏᴏᴜʀ ᴀɴsᴡᴇʀ 
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●angle B = angle C = x (say)

Sum of all angles of a triangle is equal to 180 degree.

So, By The Question...

x + x + 100 = 180

2x = 80

x = 40

So ANGLE B = 40 degree and ANGLE C = 40 degree..

Answer 2

Hope it will help you. . . . . . . . . . . .