1. Polygons Only one of these is a polygon. Do you know? A polygon MUST be a closed figure.

2. Polygons Only one of these is a polygon. Do you know? A polygon MUST have all straight sides.

3. Polygons Can you come up with a good definition of a polygon? A polygon is a closed plane figure with straight sides.

4. TRUE or FALSE Circles are polygons. Triangles are a type of a polygon. Rectangles are polygons. All quadrilaterals are polygons. T T T F

5. Polygons Time for Math Boards! Please draw ANY polygon on your board.

6. Polygons Polygons are classified by the number of sides they have.

7. NEW WORD!!!! Vertices Vertices is another word for corner. Vertex = corner Vertices = vertex plural

8. Polygons Can you name these polygons? How many sides? How many angles or vertices? 3 3 Triangle

9. Polygons Can you name these polygons? How many sides? How many angles or vertices? 4 4 Quadrilaterals

10. Polygons Can you name these polygons? How many angles or vertices? 5 Pentagon How many sides? 5

11. Polygons Can you name these polygons? How many sides? How many angles or vertices? 6 6 Hexagon

12. Polygons Can you name these polygons? How many sides? How many angles or vertices? 8 8 Octagon

13. Polygons Did you notice anything about the sides and angles of each shape? The number of angles (or vertices) and sides is the same.

14. Name That Polygon Triangle

15. Hexagon Name That Polygon

16. Quadrilateral

17. Name That Polygon Octagon

18. Name That Polygon Quadrilateral

19. Name That Polygon Pentagon