**The activities below are intended to supplement our Geometry flexbooks.**

- Geometry, first edition, Chapter 10: http://www.ck12.org/flexr/chapter/2273
- Geometry, second edition, Chapter 10: http://www.ck12.org/flexr/chapter/9459
- Basic Geometry, Chapter 10: http://www.ck12.org/flexr/flexbook/9392

## Chapter Outline

### Chapter Summary

### Image Attributions

## Description

This chapter allows students to explore the relationship between a circle’s circumference and its diameter as well as the area of regular polygons in terms of the apothem and the perimeter.

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Feb 23, 2012## Last Modified:

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