Similarity and Dilation



In this lesson, the concept of similarity is expanded to dilation, the idea of shrinking and enlarging a shape as a transformation on the coordinate plane. Students review the properties of similarity and apply them to investigate maps of the same place but at different scales. From there, students apply the definition of dilation to experiment with similarity – this time, looking at the change in coordinates rather than the change in side lengths.

Material Type:
Lesson Plan
Grade Level:
9, 10, 11, 12
Math and Maps
United States, North America
Time Period: