1. By
2-D shapes

2. Circle
attributes
sides:
vertices:
What is special about a circle:

3. Triangle
attributes
sides:
vertices:
What is special about a triangle:

4. Square
attributes
sides:
vertices:
What is special about a square:

5. Rectangle attributes sides: vertices:
What is special about a rectangle:

6. Rhombus
attributes
sides:
vertices:
What is special about a rhombus:

7. Trapezoid attributes sides: vertices:
What is special about a trapezoid:

8. Pentagon
attributes
sides:
vertices:
What is special about a pentagon:

9. Hexagon
attributes
sides:
vertices:
What is special about a hexagon:

10. Octagon
attributes
sides:
vertices:
What is special about a octagon: