**This writeup is
a library of scripts with links to various GSP scripts**
by
**Samuel Obara**
**Centroid**
**Orthocenter**
**Circumcenter**
**Circumcircle**
**Incenter**
**Incircle**
**Medial
triangle**
**Orthic
triangle**
**Pedal
triangle**
**Center
of Nine point Circle**
**Orthocenter, mid-segment triangle**
**Triangle Centers (H, G, C, I)**
**Triangle
Centers (H,G,C,I) with Euler line**
**Pentagon
given side**
**Hexagon
given side**
**Octagon given side**
**Dodecagon
given side**
**Divide
a segment AB into two parts that form a golden ratio**

**Back**** to Samuel's page**