Solid Geometry

Solid Geometry: Geometry of the Platonic Solids and the Geometry of the Cylinder, Sphere, and Cone

This book addresses the geometry taught in eighth grade in Waldorf schools.

About the Author

Harry Kretz taught high school math for many years at Hawthorn Valley Waldorf School in Upstate New York. Since retiring from full-time work, he has worked more than full time traveling and teaching courses in various Waldorf schools and teacher training centers.