How many different types of triangles can you make? How many different types are there? Which types are harder to make? Why?
More GeoGebra at
Overlapped identical triangles
Rotation of square about (0,0) (harder).
The Fraction Workbench - working w/ UNcommon Denominators
Euclid Book 1 Prop 37
Translations and Rotations
Homothety and Symmetry - George
Phantom Graph General Cubic
[Quantum Continuum]: Rafael - [graphical method]