Assertion (A) in the given figure, O is the centre of the circle with D, E and F as mid-points of AB, BO and OA respectively. If ∠DEF is 30∘, then ∠ACB is 60∘ Reason (R) Angle subtended by an arc at the centre is twice the angle subtended by it on the remaining part of the circle.

Assertion (A) in the given figure, O is the centre of the circle with

1.	Assertion (A) in the given figure, O is the centre of the circle with D, E and F as mid-points of AB, BO and OA respectively. If ∠DEF is 30∘, then ∠ACB is 60∘ Reason (R) Angle subtended by an arc at the centre is twice the angle subtended by it on the remaining part of the circle.
Answer» Assertion (A) in the given figure, O is the centre of the circle with D, E and F as mid-points of AB, BO and OA respectively. If $∠ D E F$ is $30^{\circ}$ , then $∠ A C B$ is $60^{\circ}$ Reason (R) Angle subtended by an arc at the centre is twice the angle subtended by it on the remaining part of the circle.

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Assertion (A) in the given figure, O is the centre of the circle with D, E and F as mid-points of AB, BO and OA respectively. If ∠DEF is 30∘, then ∠ACB is 60∘ Reason (R) Angle subtended by an arc at the centre is twice the angle subtended by it on the remaining part of the circle.

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