Question : 'O' is the circumcentre of triangle ABC lying inside the triangle, then
Option 1: 90°
Option 2: 60°
Option 3: 110°
Option 4: 120°
Correct Answer: 90°
Solution :
Let
In
⇒
⇒
We know that in a circle, the angle subtended by an arc at the centre is twice the angle subtended by it at the remaining part of the circle.
So,
⇒
⇒
⇒
⇒
Hence, the correct answer is 90°.
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