The Brainliest Answer!
You need to use the midpoint theorem.
ABCD is a quadrilateral. P,Q,R,S are the midpoints of AB,BC,Cd,DA
PQ is parallel to AC
RS is parallel to AC
Therefore, PQ is parallel to RS
Similarly, PS is parallel to QR
Both the pairs of opposite sides are parallel and equal.Therefore, it is a parallelogram.
3 5 3