Unit 2
Dilations, Similarity, and Introducing Slope
Unit Narrative
In this unit students learn what makes figures similar and justify claims of similarity. They are introduced to the slope of a line and use properties of similar triangles to write equations that can describe all points on a given line.
In prior grades, students learned about the relationship between scale factors and scaled copies. Students expand on this in the first section where they learn about dilations as a new transformation that creates scaled copies.
In the next section, students connect dilations to earlier work with rigid transformations as...