GeoGebra Classroom

# Lesson 1.13

## 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.

## 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.