Question

In AABC, if AB = AC and LB = 50° then find LA.​

Answer 1

Answer:

Given that AB=AC

and <B=50

If adjacent sides are equal, then the angles opposite to equal sides are also equal.

by this <C=50°

Angle sum property <A+<B+<C =180°

by calculation

50+50+x=180. let angle A is x

x=80°

Therefore <A=80°