The document defines a polygon as a closed shape made of line segments that connect at endpoints. It notes that a polygon must have at least three sides, and the sides can only connect at endpoints without crossing. The document also states that polygons have a closed shape with interior and are made up of line segments without any curves.

1. Today’s Plan: Unit 1 - Geometry
What makes a polygon?

2. Polygon

3. Polygon
A polygon is a closed shape made of line segments
(sides) connected endpoint to endpoint.

4. Polygon
A polygon is a closed shape made of sides that
connect endpoint to endpoint.

5. Polygon
A polygon is a closed shape made of sides that
connect endpoint to endpoint.

6. Polygon
A polygon is a closed shape made of sides that
connect endpoint to endpoint.
Not a polygon

7. Polygon
A polygon is a closed shape made of sides that
connect endpoint to endpoint.
Not a polygon Polygon!

8. Polygon
A polygon is a closed shape made of sides that
connect endpoint to endpoint.

9. Polygon
A polygon is a closed shape made of sides that
connect endpoint to endpoint.

10. Polygon
A polygon is a closed shape made of sides that
connect endpoint to endpoint.

11. Polygon
A polygon is a closed shape made of sides that
connect endpoint to endpoint.

12. Polygon
A polygon is a closed shape made of sides that
connect endpoint to endpoint.
Not a polygon

13. Polygon
A polygon is a closed shape made of sides that
connect endpoint to endpoint.
Not a polygon Polygon!

14. Polygons
Sides connect at endpoints (can’t cross)
Closed shape

15. Polygons
Sides connect at endpoints (can’t cross)
Closed shape
The sides are line segments (no curves)

16. Polygons
Sides connect at endpoints (can’t cross)
Closed shape
The sides are line segments (no curves)

17. Polygons
Sides connect at endpoints (can’t cross)
Closed shape
The sides are line segments (no curves)
At least three sides

18. Polygons
Sides connect at endpoints (can’t cross)
Closed shape
The sides are line segments (no curves)
At least three sides

19. Polygons
Sides connect at endpoints (can’t cross)
Closed shape
The sides are line segments (no curves)
At least three sides
Only one inside

20. Polygons
Sides connect at endpoints (can’t cross)
Closed shape
The sides are line segments (no curves)
At least three sides
Only one inside

21. Polygons

22. Polygons

23. Polygons

24. Review – Which of these are polygons?

25. Review – Which of these are polygons?

26. Review – Which of these are polygons?

27. Review – Which of these are polygons?

28. Review – Which of these are polygons?

29. Review – Which of these are polygons?

30. Review – Which of these are polygons?

31. Review – Which of these are polygons?

32. Summery
A polygon is a closed shape made of sides that
connect endpoint to endpoint.
Closed shape
The sides are line segments (no curves)
At least three sides
Only one inside