Drexel dragonThe Math ForumDonate to the Math Forum

The Math Forum Internet Mathematics Library

Recycling Topology

_____________________________________
Library Home || Full Table of Contents || Suggest a Link || Library Help
_____________________________________

Visit this site: http://www.maa.org/mathland/mathland_9_30.html
Author:Ivars Peterson (MathLand)
Description: It's hard to miss the triangle of three bent arrows that signifies recycling. It appears in newspapers and magazines and on bottles, envelopes, cardboard cartons, and other containers. But have you noticed that there are two versions of this ubiquitous symbol? The difference between them lies in the direction of the twist in two of the arrows that make up each figure. Cliff Long, a math professor at Bowling Green State University, has an eye for such details.
Levels: Middle School (6-8), High School (9-12), College
Languages: English
Resource Types: Graphics, Articles
Math Topics: Topology

[Privacy Policy] [Terms of Use]

_____________________________________
Home || The Math Library || Quick Reference || Search || Help
_____________________________________

© 1994-2013 Drexel University. All rights reserved.
http://mathforum.org/
 The Math Forum is a research and educational enterprise of the Goodwin College of Professional Studies.The Math Forum is a research and educational enterprise of the Drexel University School of Education.