An example of each of square, rectangle, triangle, rhombus, and trapezoid.

Square: floor tile surface, tabletop, light switch surface, square clock surface, carton surface.

Rectangle: computer screen surface, writing surface, rubber surface, cabinet surface, blackboard surface.

Triangle: clothes hanger, red scarf, roof, glass, warning sign.

Rhombus: the shape of sliding doors, floor tiles, doors and windows, guardrails, and flower beds.

Trapezoid: ladder, dam, ceiling fan blade, car top, cup.