1.

In the shown figure, if \[\mathbf{PQ}\text{ }\parallel \text{ }\mathbf{MN}\] and\[\mathbf{NO}\text{ }\parallel \text{ }\mathbf{QR}\], then which of the following conditions can be true?

A. \[x\text{ }=\text{ }y\]
B.  \[x+y=90{}^\circ \]
C.  \[x\text{ }+\text{ }y=180{}^\circ ~\]                                                  
D. \[x=90{}^\circ +y\]
E.  None of these
Answer» D. \[x=90{}^\circ +y\]


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