Question

please tell the proper step​

Answer 1

Explanation:

A C = 180°

AB = 60°

=AC - AB

=180° - 60°

=120°

BC = 120°

Answer 2

Answer:

Answer is BC = 120°

Explanation:

Step 1. AOB = COB = Supplementary angle.

Step 2. AOC is 180°.

Step 3. 60° + x° = 180°

x° = 180° - 60°

x° = 120°

I hope you understand ❤️