# Surf for More Math

## CHAPTER 5: MEASUREMENT

**Lesson 3: Exploring Circumference and Diameter **

Use these interactive activities to encourage students to have fun on the Web while learning about measurement. Students can try these activities on their own or in pairs.

**Goal**

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

**Builds Upon**

Student Book page 207

**Instructions for Use**

**Circumference, Perimeter of a Circle** allows students to explore the relationship between the circumference, diameter, and radius 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.