What is the sum of either pair of opposite angles of a cyclic quadrilateral?

90°

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180°

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360°

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45°

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Solution

The correct option is A
180°

The opposite angles of a cyclic quadrilateral are supplementary to each other. Hence the sum of opposite angles in a cyclic quadrilateral is $180^{\circ}$ .

Here, $∠ 1 + ∠ 2 = 180^{\circ}$

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