Grade 8 Module 3: Similarity
In Module 3, students learn about dilation and similarity and apply that knowledge to a proof of the Pythagorean Theorem based on the Angle-Angle criterion for similar triangles. The module begins with the definition of dilation, properties of dilations, and compositions of dilations. One overarching goal of this module is to replace the common idea of “same shape, different sizes” with a definition of similarity that can be applied to geometric shapes that are not polygons, such as ellipses and circles.
The student materials consist of the student pages for each lesson in Module 3.
The copy ready materials are a collection of the module assessments, lesson exit tickets and fluency exercises from the teacher materials.