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Lesson 1.13

Warm-Up: Left to Right

Work Session 1: Turning on a Grid

Please use the Geogebra applet below to complete the rigid transformations:
  1. Rotate  ABCD 90 degrees clockwise around Q.
  2. Rotate  ABCD 180 degrees around R.

Work Session 1: Turning on a Grid

Please use the Geogebra applet below to complete the rigid transformations:
  1. Rotate  HJKLMN 120 degrees clockwise around O.
  2. Rotate  HJKLMN 60 degrees counterclockwise around P.

Work Session 2: Translate, Rotate, Reflect

Mai suspects triangle ABC is congruent to triangle DEF. She thinks these steps will work to show there is a rigid transformation from ABC to DEF.
  • Translate by directed line segment v.
  • Rotate the image ____ degrees counterclockwise around point D.
  • Reflect that image over line DE.
Draw each image and determine the angle of rotation needed for these steps to take ABC to DEF.

Summary

Cool Down: Find a Sequence

Cool Down: Find a Sequence

Describe a sequence of reflections, rotations, and translations that takes ABCD onto A’B’C’D’. You can do the transformations in the drawing above, or you can describe the transformations here.

Flash Cards