The reasons for QW must be congruent to VS, QW must be parallel to Vs, and QVSW must also be a parallelogram should be explained below:
Parallelogram:
1.
Since QRST is a parallelogram
W and V are midpoints QT and RS respectively
So,
Since QT=RS
[tex](1\div 2)\times QT=(1\div 2)\times RS[/tex]
Or QW=VS (3)
QW must be congruent to VS.
2.
QT//RS (from 1)
Or QW//VS (4)
So, it QW must be parallel to Vs
3.
In a quadrilateral, if any of the two opposite sides are both parallel and equal, so the quadrilateral is a parallelogram
Therefore, QVSW must also be a parallelogram.
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