In Figure, if `/_B A C=60^0\ a n d\ /_B C A=20^0,\ ` find `/_A D C`

Explanation

To solve the problem, we need to find the angle \( \angle A D C \) in the given cyclic quadrilateral \( ABCD \) where \( \angle B A C = 60^\circ \) and \( \angle B C A = 20^\circ \).

### Step-by-Step Solution:

1. **Identify the Angles in Triangle ABC**:
- Given \( \angle B A C = 60^\circ \) and \( \angle B C A = 20^\circ \).
- Let \( \angle A B C = x \).

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