Symmetry Rotation Translation Reflection

1. Symmetry Rotation Translation Reflection

2. Symmetry

3. What is a line of symmetry? • A line on which a figure can be folded so that both sides match. • Maryland Content Standard 2.E.2 – Identify and describe symmetry in geometric figures or pictures. (Up to four lines of symmetry)

4. To be a line of symmetry, the shape must have two halves that match exactly. When you trace 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.

5. United States of America Canada Maryland England Which of these flags have a line of symmetry? No No

6. - What about these math symbols? Do they have symmetry? + - Yes Yes x Yes Yes

7. How many lines of symmetry to these regular polygons have? 5 4 3 Do you see a pattern? 8 6

8. You can look to see if your name has symmetrical letters in it too! 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

9. Rotation(Turn) The action of turning a figure around a point or a vertex.

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

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

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

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

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

15. Which shapes show reflection, translation, or rotation? Reflection Rotation Translation