#### Activity Overview

Students measure the circumference and diameter of circular objects. The measurements are used to estimate pi. A rule is established and entered into the calculator to predict the circumference of other circles.

#### Objectives

Investigate index notation and represent whole numbers as products of powers of prime numbers. ACMMG-197

#### Vocabulary

- Circumference
- Radius
- Diameter

#### About the Lesson

Students measure the circumference and diameter of circular objects, tabulate the data and determine the ratio between circumference and diameter of a circle. (pi) In the second part of this task students use this ratio in a formula to determine the circumference of a circle.

This activity includes teacher notes and curriculum references, two worksheets, an assessment task and suggested answer.