## Supplements to some chapters of Experiencing Geometry 3rd edition

### Chapter 0 Historical Strands of Geometry

This chapter on historical strands of geometry is much more expanded in the book  Crocheting Adventures with the Hyperbolic Planes by Daina Taimina (AK Peters, 2009)

Experiencing Meaning in Geometry - by David W. Henderson & Daina Taimina

How to Use History to Clarify Common Confusions in Geometry by David W. Henderson & Daina Taimina

### Chapter 5 Straightness on Hyperbolic Planes

Crocheted Hyperbolic Plane by David W. Henderson & Daina Taimina

Annuli for hyperbolic paper model this is a template to print out for making hyperbolic paper model from anulli

Template for hyperbolic soccer ball - please print 3 pages with hexagons and one page of heptagons to have a template for 3 models, of course, you can make your model as big as you like :-)

Software for hyperbolic geometry - NonEuclid offers straightedge and compass constructions in hyperbolic geometry.

### Chapter 13 Square Roots, Pythagoras, and Similar Triangles

Square Roots in the Sulbasutra by David W. Henderson

### Chapter 16 Inversions in Circles

Interactive examples by David W. Henderson (requires a Java 1.1 compatible browser, please be patient ? first download is slow):

### Chapter 17 Projections (Models) of Hyperbolic Planes

Crocheted Hyperbolic Plane by David W. Henderson & Daina Taimina

Annuli for hyperbolic paper model this is a template to print out for making hyperbolic paper model from anulli

Template for hyperbolic soccer ball - please print 3 pages with hexagons and one page of heptagons to have a template for 3 models, of course, you can make your model as big as you like :-)

Reflection of triangle in upper half plane model ? interactive example by David W. Henderson (requires a Java 1.1 compatible browser, please be patient ? first download is slow)

• Modeling the Brain - Projecting the surface of the human brain onto a sphere and/or hyperbolic plane with discussions of preserving angles, versus preserving distances, and/or versus preserving areas.

### Chapter 19 Geometric Solutions of Quadratic and Cubic Equations

Geometric solutions of Quadratic and Cubic Equations by David W. Henderson

### Chapter 21 Mechanisms

Kinematic models for Design Digital Library

Universal Joint

Reuleaux Triangle