## CHAPTER 5: MEASUREMENT

**Lesson 3: Exploring Circumference and Diameter **

**Goal**

Investigate the relationship between the diameter and circumference of a circle.

**Instructions for Use**

**Circumference, Perimeter of a Circle**

Drag the orange dots to move and resize the circle. Note the radius changes and the circumference is calculated for that radius. Read through the information on the different formulas that reflect the relationship between circumference, diameter, and radius of a circle.