2.5

1. 2.5 How Can See It? Pg. 20 Classify Polygons

2. 2.5 – How Can I See It?______________ Classify Polygons In this section you will discover the names of the many different polygons and how they are classified.

3. Polygon: 1. Has at least 3 sides 2. No sides overlap 3. No curved sides

4. Line segment forming the polygon Side: M Q T R S

5. Point where two sides meet Vertex: M M T Q S T R Q R S

6. Consecutive Sides: Two sides that share a point, one after the other M Q T R S

7. Segment that joins two nonconsecutive sides Diagonal: M Q T R S

8. triangle quadrilateral pentagon

9. hexagon heptagon octagon nonagon decagon 11-gon dodecagon 13-gon n-gon

10. Convex: No corners point inside the shape Concave: Not convex! A corner points inside the shape

11. 1. State whether the shape is a polygon. If yes, is it concave or convex? If no, why not? Yes, Concave or Convex OR No, _________________ Curved side

12. 1. State whether the shape is a polygon. If yes, is it concave or convex? If no, why not? Yes, Concave or Convex OR No, _________________

13. 1. State whether the shape is a polygon. If yes, is it concave or convex? If no, why not? Yes, Concave or Convex OR No, _________________

14. 1. State whether the shape is a polygon. If yes, is it concave or convex? If no, why not? Yes, Concave or Convex OR No, ____________________ Overlaps

15. All angles are congruent All sides AND all angles are congruent All sides are congruent

16. 2. Classify the name of the polygon by the number of sides. Is the polygon equilateral, equiangular, regular, or neither? a. Pentagon Equilateral

17. b. quadrilateral Regular

18. c. Octagon Equiangular

19. d. Heptagon Regular

20. e. decagon equilateral

21. f. Hexagon neither