The following scripts have been helpful in my explorations in EMT668.

Triangle Centers:
1. Centroid (G)
2. Orthocenter (H)
3. Circumcenter (C)
4. Incenter (I)

Special Triangles:
1. Medial Triangle
2. Orthic Triangle
3. Pedal Triangle

Using Centers of a Triangle:
1. Circumcircle
2. Incircle
3. Center of a Nine-point circle
4. Nine-point circle

Regular Polygons:
1. Equilateral Triangle
2. Square
3. Hexagon
4. Pentagon

5. Octagon

Miscellaneous:

1. golden ratio