Question

In the figure, O is the centre of the circle and ∠ACB = 40° then ∠AOB =

विकल्प

• 80°

• 85°

• 70°

• 65°

Answer 1

80°

Explanation;

Hint:

∠AOB = 2∠ACB ...(The angle subtended by an arc of the circle at the centre is double the angle subtended at the remaining part of the circle.)

= 2 × 40°

= 80°