ANSWER
• Quadrilateral
EXPLANATION
In a parallelogram, opposite sides are parallel and congruent - they have the same length.
A rectangle is like a parallelogram, but all interior angles are right angles.
A square has four congruent sides, as well as a rhombus.
If a trapezoid is isosceles, then the non-parallel legs are congruent. If it is not isosceles, then all sides have different lengths and two opposite sides are parallel.
We know that this is a quadrilateral because it has 4 sides.
