MCQ
- A160º
- B60º
- C80º
- D30º
✓
Answer
- 60º
Solution:
$\angle\text{ACD}=\angle\text{B}+\angle\text{A}$ (Exterior angle property)
$\Rightarrow110^\circ=50^\circ+\angle\text{A}$
$\Rightarrow\angle\text{A}=60^\circ$
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