MTT

One applet I like allows students to review the graph of an ellipse or a hyperbola.  It was interesting to change the variables so the graph of the ellipse turns into a hyperbola.  I think this a a cool way to review and make the concepts plant a bit better in the students minds.

Another applet is a simple visual explanation of why Side-Side-Angle does not prove triangle congruence.  I think this is great thing for students to manipulate and explore so they are not tempted to use it in their proofs.

The last applet I would like to share involves Morley’s Theorem.  This Theorem trisects the angles inside a triangle and the intersections for an equilateral triangle.  I’m not sure if geometry classes would teach this but it could be a fun exploration when working with triangles.

I thought the Side-Side-Angle applet did something cool that I would like to learn how to do.  Once the triangle was complete, the color changed.  When creating these types of applets and examples this might be useful to show completion or non-completion of the activity.