2. Symmetry TRANSFORMATIONS Rotation Translation Reflection Dilation HOMEWORK: Symmetry WS

3. Symmetry

4. What is a line of symmetry? A line on which a figure can be folded so that both sides match. To coincide.

5. To be a line of symmetry, the shape must have two halves that match exactly. When you trace half a heart onto a piece of folded paper, and then cut it out, the two half hearts make a whole heart. The two halves are symmetrical.

6. Which of these flags have a line of symmetry? United States of AmericaCanada MarylandEngland

7. What about these math symbols? Do they have symmetry?

8. How many lines of symmetry to these regular polygons have? Do you see a pattern?

9. Identify the letters that are Horizontally or Vertical Lines of Symmetry A B C D E FG H I J K L M N O P Q R S T U V W X Y Z Infinite number

10. Symmetrical Words A H I M O T U V W X Y Vertically Symmetric B C D E H I K O X Horizontally Symmetric

11. Rotational Symmetry (Turn) The action of turning a figure around a point or a vertex.

12. Rotational Symmetry

14. Rotational Symmetry all around us Which road signs have got rotational symmetry? Click to see the answers.

15. Rotational Symmetry all around us Which road signs have got rotational symmetry?

16. Identify the Rotationally Symmetric Letters A B C D E FG H I J K L M N O P Q R S T U V W X Y Z

17. Maryland Letters may possess rotational symmetry. H I N O S X Z Flags may possess rotational symmetry.

18. Point Symmetry A figure also has point symmetry if it can be rotated 180 degrees. 360/4 = 90 two rotation make 180

19. Examples: Name the type(s) of symmetry each figure has. Rotation of 120 reflection Rotation and point reflection

21. Click the triangle to see rotation Turning a figure around a point or a vertex

22. Translation (Slide) The action of sliding a figure in any direction.

23. The act of sliding a figure in any direction. Click the Octagon to see Translation.

24. Reflection (flip) The result of a figure flipped over a line.

25. Click on this trapezoid to see reflection. The result of a figure flipped over a line.

26. Which shapes show reflection, translation, or rotation?