1. Centroid
2. Orthocenter
3. Circumcenter
4. Circumcircle
5. Incenter
6. Incircle
7a. Orthocenter, Mid-segment Triangle
10. Center of Nine point circle
13. Equilateral triangle, given a side
15. Isosceles triangle, given base and altitude
16. Triangle centers (H, G, C, I)
17. Triangle centers with Euler Line
22. Divide a segment into the Golden Ratio
23. Koch Segment
24. Circle Tangent to 2 Given Circles
25. Circle tangent to the tangent Circle from 24 and one of the tangent circles