1. EQ: What are the properties of different quadrilaterals?

2. Parts of a Polygon
Diagonal
Side
Vertex

3. Diagonal
A segment that connects 2 nonconsecutive vertices

4. Open Vs. Closed
Open Figure: a figure where the sides do not all connect.
Closed Figure: a figure where the sides do all connect.

5. Concave Vs. Convex
Concave: a polygon in which a diagonal can be drawn outside the polygon.
Convex: a polygon in which NO diagonals can be drawn outside the polygon.

6. Regular Vs. Irregular
Regular Polygon: a polygon where ALL angles are congruent and ALL sides are congruent.
Irregular Polygon: a polygon where NOT all angles and sides are congruent.

7. Open or Closed?

8. Concave or Convex?

9. Regular or Irregular?

10. Polygons are named according to their _______
sides
Polygons are named according to their _______
Number of Sides
Name 3 8 4 9 5 10 6
n-sides 7 23
triangle
octagon
quadrilateral
nonagon
pentagon
decagon
hexagon
n-gon
septagon
23-gon

11. 3 Things that define a polygon
MUST be Closed
Cannot be round
Lines cannot cross

12. Polygon?
Tell whether each shape is a polygon. If it is a polygon, tell whether it is regular or irregular; convex or concave; name it by its sides.

13. Polygon?
Tell whether each shape is a polygon. If it is a polygon, tell whether it is regular or irregular; convex or concave; name it by its sides.

14. Polygon?
Tell whether each shape is a polygon. If it is a polygon, tell whether it is regular or irregular; convex or concave; name it by its sides.

15. Polygon?
Tell whether each shape is a polygon. If it is a polygon, tell whether it is regular or irregular; convex or concave; name it by its sides.

16. Polygon?
Tell whether each shape is a polygon. If it is a polygon, tell whether it is regular or irregular; convex or concave; name it by its sides.

17. Polygon?
Tell whether each shape is a polygon. If it is a polygon, tell whether it is regular or irregular; convex or concave; name it by its sides.