MCQ
If A, B, C are three points on a circle with centre O such that $\angle A O B=90^{\circ}$ and $\angle B O C=120^{\circ}$, then $\angle A B C=$
- A$60^{\circ}$
- ✓$75^{\circ}$
- C$90^{\circ}$
- D$135^{\circ}$
✓
Answer
Correct option: B.
$75^{\circ}$
b
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