Intro to Rigid Transformations
Students learn to name, signal and perform translations, reflections and rotations without a grid.
Transformations and Congruence · Lesson 6 of 8
Exploring and Proving Congruency
Students define congruent, spot congruent figures, and prove or disprove congruence with rigid motions.
Look inside: preview PDFWhat's included
- Animated PowerPoint lesson
- Guided notes and problems
- 4 practice pages (Congruent or Not?, Identify the Transformation, Identify a Series, Mixed)
- Find the Mistake
- Exit tickets
- Game of All Games
- Full answer keys
- Teacher guide
- Student pages in PDF and editable PowerPoint
- Grades
- 8th grade, plus high school geometry review
- Standards
- CCSS 8.G.A.2, 8.G.A.1 | HSG.CO.B.6
- Materials
- Pencil, ruler; tracing paper helps
More Transformations and Congruence Lessons
Transforming Coordinate Points
Students translate, reflect and rotate points, then discover and write the coordinate rule for each move.
Rigid Transformations on the Coordinate Grid
Students translate, reflect and rotate figures on the grid, then write the image coordinates and the rule.
Series of Transformations
Students name, describe and check a series of translations, reflections and rotations on the grid.
Corresponding Properties
Students match corresponding points, sides and angles, then use them to prove congruence and find missing measures.
How to Dilate an Image
Students dilate figures about the origin and from any center, then watch rays from the center check their work.
Sequences of Transformations
Students combine rigid motions with dilations, find a dilation's center and scale factor, and decide congruent or similar.