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  1. In a cyclic quadrilateral ABCD m∠A + m∠B + m∠C + m∠D =?
    1. 90°
    2. 360°
    3. 180°
    4. 120°
Correct Option: B

As we know that the sum of opposite angles of a concyclic quadrilateral is 180°.
i.e. m∠A + m∠B + m∠C + m∠D = 180°.


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