Question

In a triangle ABC, if A=120and AB=AC.Find B and C

Answer 1

Answer:

in triangle ABC,

A+B+C=180 (angle sum prop. of triangle )

120+B+C=18

B+C=60 ...(1)

AB=AC

so, A=B (angle opposite to equal sides are equal)

so, in eq.(1)

B+C=60

B+B=60

2B=60

B=30

so, B=C=30