To prove : The congruency of
Explanation of Solution
Given information : The following information has been given
Formula used : Adjacent
Proof : We are given that
Hence, we can say that the quadrilateral is a parallelogram
Now, we know that the adjacent angles of a parallelogram are supplementary
Thus, we can say that
Now, as
Clearly, we note that
Hence, the desired congruency is proved
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