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GeoGebraGeoGebra Classroom

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. RotateĀ Ā ABCD 90 degrees clockwise aroundĀ Q.
  2. RotateĀ Ā ABCD 180 degrees aroundĀ R.

Work Session 1: Turning on a Grid

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

Work Session 2: Translate, Rotate, Reflect

Mai suspects triangleĀ ABCĀ is congruent to triangleĀ DEF. She thinks these steps will work to show there is a rigid transformation fromĀ ABCĀ to DEF.
  • Translate by directed line segmentĀ v.
  • Rotate the image ____ degrees counterclockwise around pointĀ D.
  • Reflect that image over lineĀ DE.
Draw each image and determine the angle of rotation needed for these steps to takeĀ ABCĀ toĀ DEF.

Summary

Cool Down: Find a Sequence

Cool Down: Find a Sequence

Describe a sequence of reflections, rotations, and translations that takes ABCD onto Aā€™Bā€™Cā€™Dā€™. You can do the transformations in the drawing above, or you can describe the transformations here.

Flash Cards