In the figure
'G' is the centre of the circle. Find the angle ACB when ∠AGN = 150°.
Answer & explanation
Correct answer: option 4
We know that,
The angle made by the chord at centre is double the angle made by it in a major segment of the circle.
We have,
∠AGB = 150°
∠AGB = 2 × ∠ACB
= 150° = 2 × ∠ACB
= ∠ACB = 75°