In the figure- O is the center and - ACB-20- Then the - AOB is equal to

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Angle Subtended by an Arc of a Circle on the Circle and at the Center

In the figure...

Question

In the figure, $O$ is the center and $∠ A C B = 20^{\circ}$ . Then the $∠ A O B$ is equal to

40^{\circ}

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60^{\circ}

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20^{\circ}

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30^{\circ}

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