This image has a variety of polygons: a pentagon which has five sides, a hexagon which has six sides, and an octagon with eight sides. It even has squares which are a subcategory of both rhombuses and rectangles, which are subcategories of parallelograms because they have two sets of parallel sides. Rhombuses are required to have four equal sides and rectangles are required to have four right angles.

I found a bunch of parallelograms on the wall. They are parallelograms because they have two set of parallel lines. Parallelograms are a subcategory of quadrilaterals because they have four sides.

At the center of this Eiffel Tower painting is a trapezoid. Trapezoids are quadrilaterals which have exactly one set of parallel lines.