8.2 Unit Overview

Students study dilations and similar figures. They use similar triangles to explain, understand, and apply the concept of slope.

By Amplify Classroom

Grades: 8th Grade

Subject: Math

Learning goals: Sub-Unit 1: Dilations (Lessons 1–5 + Practice Day + Quiz) • Dilate figures on and off a coordinate grid. • Identify the scale factor and the center of dilation. • Describe dilations precisely using terms such as pre-image, center of dilation, and scale factor. Sub-Unit 2: Similarity (Lessons 6–8) • Use transformations to determine whether two figures are similar. • Justify whether two figures are similar using terms such as translation, reflection, rotation, dilation, pre-image, and image. Sub-Unit 3: Slope (Lessons 9–10 + Practice Day) • Make connections between the slope of a line and similar triangles created by that line. • Determine the slopes of lines. • Explain how to calculate the slope of a line using vocabulary from this unit.