1. Wedneday, March 5 Chapter13-5 Symmetry

2. There are many types of symmetry.

3. Symmetry Rotational symmetry is when a shape can be rotated less than 360 ° and look exactly the same.

4. Symmetry Rotational symmetry is when a shape can be rotated less than 360 ° and look exactly the same. The order is how many matches there are as the shape is rotated once.

5. Symmetry Rotational symmetry is when a shape can be rotated less than 360 ° and look exactly the same. The order is how many matches there are as the shape is rotated once. Shapes are considered to have rotational symmetry if they have more than one order.

6. Symmetry How many orders of rotational symmetry does this shape have?

7. Symmetry How many orders of rotational symmetry does this shape have?

8. Symmetry How many orders of rotational symmetry does a regular pentagon have?

9. Symmetry How many orders of rotational symmetry does a regular pentagon have? 5

10. Symmetry How many orders of rotational symmetry does this shape have?

11. Symmetry How many orders of rotational symmetry does this shape have? 8

12. Symmetry How many orders of rotational symmetry does this shape have?

13. Symmetry How many orders of rotational symmetry does this shape have? 1 Does it have rotational Symmetry?

14. Symmetry How many orders of rotational symmetry does this shape have? 1 Does it have rotational Symmetry? No

15. Symmetry How many orders of rotational symmetry does this shape have?

16. Symmetry How many orders of rotational symmetry does this shape have? 3 – consider the color.

17. Symmetry Point symmetry is when every part has a matching part the same distance from a central point, but in an opposite direction.

18. Symmetry This shape has point symmetry. All the spots on the shape are the same distance from a central point, but in an opposite direction.

19. Symmetry Playing cards often have point symmetry so they look the same from the top or bottom.

20. Symmetry Which shapes have point symmetry?

21. Symmetry Which shapes have point symmetry? A and C

22. Symmetry A shape has line symmetry, or reflection symmetry, if it can be folded in half so the two halves match exactly.

23. Symmetry Can this be folded along the dotted line to create a line of symmetry?

24. Symmetry Can this be folded along the dotted line to create a line of symmetry? No

25. Symmetry Can this be folded along the dotted line to create a line of symmetry?

26. Symmetry Can this be folded along the dotted line to create a line of symmetry? Yes.

27. Symmetry This picture was made symmetrical by using a computer. The white line is the line of symmetry.

28. Symmetry The line of symmetry, sometimes called a mirror line, does not have to be up to down, or left to right. It can be in any direction.

29. Symmetry This shape has a horizontal line of symmetry.

30. Symmetry Sometimes there are more than one line of symmetry. A regular triangle (equilateral) has three lines of symmetry.

31. Symmetry A regular quadrilateral (square) has four lines of symmetry.

32. LSymmetry A regular pentagon has five lines of symmetry.

33. Symmetry Is there a pattern?

34. Symmetry In any regular polygon, the number of lines of symmetry is equal to the number of sides.

35. Symmetry How many lines of symmetry does a circle have?

36. Symmetry A circle has an infinite numbers of lines of symmetry.

37. Symmetry Additional note on Blizzard Bags Tear off the instruction page and place in your notes. Write your name and period you have math in the upper right hand corner of the worksheet.

38. Symmetry Agenda Notes – Homework – Practice Skills 13-5 Due Thursday, March 6 Chapter 13 Test Monday, March 10