Question

In Fig. if ∠ABC = 20º, then ∠AOC is

equal to:

(a) 20º

(b) 40º

(c) 60º

(d) 10º​

Answer 1

Answer:

ans - option b 40°

angle AOC is equal to 40°

Answer 2

Given, ∠ABC = 20°

We know that, angle subtended at the centre by an arc is twice the angle subtended by it at the remaining part of circle.

∠AOC = 2∠ABC = 2 x 20° = 40°

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