Here’s a list of recent additions:
– A new Geometric Construction page, including a whole unit with a teachers’ guide, plus a GeoGebra page with tools limited to straightedge and compass construction. Also an applet / file for making triangles given SSS, SAS, etc. and the accompanying worksheet (“Constructing Triangles”.) And finally an applet that makes clear why SSA does not guarantee congruence.
– New GeoGebra files to accompany my analysis of Soccer Angles — a geometric optimization problem which unexpectedly leads to a hyperbola. It is an advanced extension to a hands-on lesson in Geometry Labs. The original lesson is an application of the inscribed angle theorem, geared to a normal 10th grade geometry class.
More soon, I hope.