Polygons

1. Other shapes

2. Parallelograms

2.1. 2 pairs of parallel sides

2.1.1. Rhombus

2.1.1.1. 4 equal sides

2.1.2. Square

2.1.2.1. 4 equal sides AND 4 right angles

2.1.3. Rectangle

2.1.3.1. 4 right angles

3. Triangles

3.1. Right triangles

3.1.1. one angle is 90 degrees

3.2. Other triangles

4. Quadrilaterals

4.1. Trapezoids

4.1.1. 1 Pair of parallel sides

4.2. Other quadrilaterals