Geometer's Sketchpad Tools
1. Centroid
2. Orthocenter
3. Circumcenter
4. Circumcircle
5. Incenter
6. Incircle
7. Incircle and Incenter
8. Excenters
9. Excircles
10. Excircles and Excenters
11. Incircle and Excircles with centers
12. Medial Triangle
13. Orthocenter, with Mid-segment Triangle
14. Orthic Triangle
15. Pedal Triangle
16. Center of Nine Point Circle
17. Nine Point Circle
18. Trisecting a line segment
19. Equilateral Triangle, give a side
20. Square, given a side
22. Triangle Centers (H, G, C, and I)
23a. Triangle Centers with Euler Line
23b. Triangle Centers with Euler Segment
24a. Circle Tangent to Two Given Circles 1
24b. Circle Tangent to Two Given Circles 2
Write-up by Robert Childres.