Quadrilaterals are polygons with 4 sides and 4 angles. Parallelograms have two sets of parallel opposite sides, rectangles have two sets of parallel sides and four right angles and are a type of parallelogram, squares have four equal sides, four right angles and are both rectangles and parallelograms, rhombuses are parallelograms with four equal sides but not necessarily right angles, and trapezoids only have one set of parallel sides and are not parallelograms.

1. Quadrilaterals Four Sides Four Angles Fourth Graders

2. In General …` Quadrilaterals are polygons that have 4 sides and 4 angles.

3. Parallelograms A parallelogram has two parallel pairs of opposite sides.

4. Rectangles A rectangle has two sets of opposite sides parallel, and four right angles. It is also a parallelogram, since it has two pairs of parallel sides.

5. Squares … A square has two pairs of parallel sides, four right angles, and all four sides are equal. It is also a rectangle and a parallelogram.

6. Rhombus … A rhombus is a parallelogram with four equal sides. It is not always a rectangle because a rhombus does not have to have 4 right angles.

7. Trapezoids … Trapezoids only have one pair of parallel sides. It is not a parallelogram. `

8. Venn Diagram of Quadrilaterals Trapezoids Parallelograms Rectangles Squares Rhombuses