In this lesson, students apply their knowledge of the relationships between original and scaled figures. Students decide what information is necessary to move backward and forward between lengths, surface areas, and volumes of an original solid and its dilation. They communicate with each other to obtain the data they need to solve a problem. Then, in an optional activity, they create a mathematical model of a real-world situation.

As students persist in asking their peers for information, they are making sense of a problem (MP1).

Today’s community building centers on the teacher sharing their draft commitments as part of the mathematical community. At the end of the lesson, students are invited to suggest additions to the teacher sections of the chart.