Identifying quadrilaterals worksheets | K5 Learning Quadrilaterals worksheets: squares, rectangles, rhombuses and more. Quadrilaterals are polygons with 4 sides and 4 vertices. In these worksheets, students review different quadrilateral shapes such as squares, rectangles, trapezoids and rhombuses. Matching shapes to their name: Worksheet #1. Naming quadrilaterals: Worksheet #2.