Things to Learn

  • Discover that the reflection is its own inverse transformation.
  • Understand that a sequence of a reflection followed by a translation is not necessarily equal to a translation followed by a reflection.

Sequencing Reflections and Translations

Exercise and Practice

Before you Go

  • Choose an area at a white board. Leave room for other students and share.
  • Use a straight edge to draw a diagonal line across your section of the board. Label the line L.
  • Use a string and marker to make a small circle on one side of line L. Keep the center point. Label the circle A.
  • Translate the circle along the horizontal edge of the board (top or bottom) to a center point an equal distance on the other side of line L (this is a translation, not a reflection). Label the new circle A’.
  • Reflect A’ across line L. Label the new circle A”.
  • Translate A” along the vertical edge of the board (a side) to a center point an equal distance on the other side of line L (this is a translation, not a reflection). Label the new circle A”’.
  • Reflect A”’ across line L. Label the new circle A””.
  • Take a picture with the IPad and email to Mr. Clarkson.