GeoGebra Materials Team
Investigate the relationship between angle measures when two lines are cut by a transversal.
Use the blue endpoints to move the lines. Use the checkboxes to turn each set of angles on and off.
Math Ch.8 project1
Andy's Geo Picture
Barycentric coordinates for Nagel point of a triangle
The Derivative as a Function
animated minimal art
Explore Properties of Parallelograms