Math Focus 7

## CHAPTER 5: MEASUREMENT

### Lesson 4: Calculating Circumference

Use these interactive activities to encourage your child to have fun on the Web while learning about measurement.

Goal

Apply the formula for the circumference of a circle using ¶ (Pi).

Builds Upon

Student book pages 208–213

Instructions for Use

Challenge Exercises: Circumference of a Circle allows your child to practice finding the circumference, diameter, and radius of a circle.

Read through the explanation of the number ¶ (Pi) and the formula for calculating the circumference of a circle, look at the example questions, and then scroll down to the Exercises. Solve each problem and type your answer into the blank text box. Click the “Enter” button to check each answer.

Calculating the Circumference of a Circle allows your child to practice finding the circumference of a circle.

To use Calculating the Circumference of a Circle, read the instructions for calculating circumference of a circle at the top, and then scroll down to the practice section. Click the “Start” button to get a problem, and type your answer in the blank text box. Click the “Check” button to check each answer. The activity will keep track of how many correct answers you give.