Question

In the given figure AB=AC, <B=50, find
(a) < C
(b) < ACD​

Answer 1

Given that,

AB=AC

∠ABC=50°

To find,

∠ACB=?

∠ACD=?

Calculations,

as we know that, opposite angles of the same sides are equal

.'. m∠ACB=m∠ABC=50°

.'.m∠ACB=50°

but ,

m∠ACB and m∠ACD are in same line

.'.m∠ACB+m∠ACD=180°

m∠ACD+50°=180°

m∠ACD=180°-50°

m∠ACD=130°

hope it helps to you☺️