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Standard VIII
Mathematics
Question

Quadrilateral CDEF is a parallelogram.
194993_958bcccd840f452f85baabb30dfe8bc2.png

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Solution
Verified by Toppr

From the figure in question, ABCD is a rectangle, i.e AB||CD....(i)
and AB=CD
Similarly, from rectangle ABEF,
AB||EF and AB=EF.....(ii)
and BE||AF
From (i) and (ii)
CD||AB||EF
⇒CD||EF i.e CDEF is a parallelogram as opposite sides are parallel.

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