Unit 3
Measuring Circles
Unit Narrative
In this unit, students apply their knowledge of proportional relationships to the context of measuring circles. They learn the relationships between radius, diameter, circumference, and area of circles and use these relationships to solve problems. This builds on students’ work from previous grades with perimeter and area of polygons. Students will build on this work in grade 8 when they study the volume of spheres, cylinders, and cones.
The unit begins with activities designed to help build up students’ vocabulary for describing circles more precisely. The terms "center," "radius," "diameter,"...