Description
Contents:
- Foreword
- Introduction
- Angles in Regular Polygons
- Triangles
- The Right Triangle and the Circle: The Theorem of Thales
- The Rules of the Right Triangle
- The Principles of Congruence and Basic Assignments Using the Triangle
- The Important Lines of a Triangle
- The Platonic Solids
- Teaching Projection and Shadow Drawing in the Upper Elementary Grades
- Geometry and Mineralogy
- Outlook
- Endnotes
- Bibliography