In parallelogram ABCD, X and Y are midpoints of opposite sides AB and DC. AY and DX meet at P; BY and CX meet at Q. Identify the quadrilateral PXQY.

Introduction / Context:
Midpoint constructions inside a parallelogram produce families of parallel segments. The intersections of such segments often form parallelograms due to the preservation of parallelism and equal division.

Given Data / Assumptions:

• X is midpoint of AB; Y is midpoint of DC.
• AY and DX intersect at P; BY and CX intersect at Q.
• AB ∥ DC and AD ∥ BC.

Concept / Approach:
Use vector or coordinate geometry: place A(0,0), B(b,0), D(0,h), C(b,h). With X and Y as midpoints, lines AY and DX are transversals joining a vertex to the midpoint of the opposite side. Their intersection P and the analogous Q from BY and CX create opposite sides PX and QY that are parallel, as are PY and QX, which ensures PXQY is a parallelogram.

Step-by-Step Solution:
Express points X and Y: X = (b/2, 0), Y = (b/2, h).Parametrize AY and DX, compute intersection P; similarly obtain Q from BY and CX.Show that vectors \u2192PX and \u2192QY are equal and parallel; likewise \u2192PY and \u2192QX.

Verification / Alternative check:
By midpoint theorem and parallelism, the mid-segment structure guarantees opposite sides of PXQY are parallel.

Why Other Options Are Wrong:
Rectangle/square impose right angles; rhombus needs all equal sides—neither is generally forced here.

Common Pitfalls:
Assuming right angles from midpoint constructions; parallelogram is the only invariant conclusion.

Final Answer:
Parallelogram