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In the diagram below, quadrilateral ABCD is inscribed in circle P.What is m< DCB?

In the diagram below, quadrilateral ABCD is inscribed in circle P.What is m< DCB-example-1

1 Answer

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ANSWER

A) 70º

Step-by-step explanation

In quadrilaterals inscribed in a circle, opposite angles are supplementary - their measures add up 180º. Therefore:


\begin{gathered} m\angle DAB+m\angle DCB=180º \\ 110º+m\angle DCB=180º \\ m\angle DCB=180º-110º \\ m\angle DCB=70º \end{gathered}

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