2. Polygons

3. Polygons Simple, Simple, Closed figure Closed figure Made up of line segments Made up of line segments

5. Types of Polygons Triangles three sides Quadrilaterals four sides

6. Pentagon five sides

8. Pentagon five sides Hexagon six sides Heptagon seven sides

9. septuplets

10. Octagon eight sides

11. STOP

12. Octagon eight sides Nonagon nine sides Decagon ten sides

13. Review A polygon is a simple, closed, figure made up of line segments. A polygon is classified by the number of sides it has.

14. Can you classify these polygons?

15. Regular Polygons A regular polygon has all sides and all angles congruent. A regular polygon has all sides and all angles congruent. B Which is a regular polygon? A

16. Triangles Triangles can be classified by their sides or by their angles. Triangles can be classified by their sides or by their angles.

17. Triangles Classifying triangles by the angles….

18. Acute Triangle All angles are acute.

19. Right Triangle Contains one right angle.

20. Obtuse Triangle Contains one obtuse angle.

21. Classify Triangles by their angles Acute Acute –All angles are acute Right Right –Contains one right angle Obtuse Obtuse –Contains one obtuse angle

22. TRIANGLES Classifying triangles by their sides…

23. TRIANGLES SCALENE

24. TRIANGLES SCALENE ISOSCELES

25. TRIANGLES SCALENE ISOSCELES EQUILATERAL

26. Classify triangles by its sides Scalene Scalene –No sides congruent Isosceles Isosceles –Two sides congruent Equilateral Equilateral –All sides congruent

27. WHAT IS A REGULAR TRIANGLE CALLED?

29. QUADRILATERALS

30. SQUARES

31. QUADRILATERALS SQUARES RECTANGLES

32. QUADRILATERALS SQUARES RECTANGLES PARALLELOGRAMS

33. RHOMBUS

34. TRAPEZOIDS

35. WHAT ARE REGULAR QUADRILATER- ALS CALLED?

36. Squares