MCQ
Write the correct answer in the following:In Fig. if $\angle\text{ABC}=20^\circ,$ then $\angle\text{AOC}$ is equal to:
- A$20^\circ$
- ✓$40^\circ$
- C$60^\circ$
- D$10^\circ$
✓
Answer
Correct option: B.
$40^\circ$
Given, $\angle\text{ABC} = 20^\circ$
We know that, angle subtended at the centre by an arc is twice the angle subtended by it at the remaining part of circle.
$\angle\text{AOC} = 2\angle\text{ABC} = 2 \times 20^\circ = 40^\circ$
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