My Blog: Notes from a Retired Teacher

My Non-Math Blog

My GeoGebra Page

My experiment blog (trying out Wordpress)

dy/Dan Blog

willhardin.com

My "Issues" Page

A gathering of my GeoGebra favorite creations

Simple Roses Lines and circles 9 Point Circle Do tires move in circles? Ellipses a different way The Birth of an Ellipse! Basic Fraction Addition All related to a circle... Regular pentagon (oddly?) SSS problem without law of cosines Ellipses viewed from different perspectives Skeleton of the Sine and Cosine Graphs Application of tangent lines