Question

Answer the questions in Attachment....​

Answer 1

Answer:

60°

Step-by-step explanation:

We have,

    AB = AC

⇒  ∠B = ∠C

Now,

       ∠ACB + ∠ACD = 180°

⇒     ∠C + 120° = 180°

⇒     ∠C = 60°

⇒     ∠B = 60°

Using Angle Sum Property in ΔABC, we obtain

         ∠A + ∠B + ∠C = 180°

⇒       ∠A + 60° + 60° = 180°

⇒       ∠A = 180° - 120°

⇒        ∠A = 60°

Answer 2

$\huge\red{Answer}$

Given :-

AB=AC

=> <ABC = <ACB

To find :-

<A

Solution :-

<ACB+<ACD = 180° *( linear pair)

=> <ACB+120° = 180°

=> <ACB = 60°

AC = AB

=> <ABC = <ACB = 60°

In triangle ABC

<A+<B+<C = 180° (angle sum property)

=> <A+60°+60° = 180°

=> <A = 180°-120°

=> <A = 60°

HOPE IT HELPS YOU !!