Explored by:
Aubrey D. Johnson
8. Orthocenter, Mid-Segment Triangle
11. Center of Nine Point Circle
14. Equailateral Triangle, Given a Side
16. Isosceles Tirangle, Given Base and Altitude
17. Triangle Centers with (H, G, C and I)
18. Triangle Centers with Euler Line
19. Locus of Vertex of a Fixed Angle that Subtends a Fixed Segment
20. Divide a Segment AB into Two Parts that Form a Golden Ratio