Investigation by Jake Klerlein

The following list contains active links to Geometer's Sketchpad (GSP) scripts. When opened in GSP, one may create the particular construction by simply starting with the given criteria named in that portion of the script. I chose these particular twenty because they are both useful and interesting.

1. Centroid

2. Orthocenter

3. Circumcenter

4. Circumcircle

5. Incenter

6. Incircle

7. Medial triangle

7a. Orthocenter, Mid-segment triangle

8. Orthic triangle

9. Pedal triangle

10. Center of Nine point circle

11. Nine Point Circle

12. Triangle Centers (H, G, C, and I)

13. Trisecting a line segment

14. Equilateral triangle, given a side

15. Square, given a side

16. Isosceles triangle, given base and altitude

17. Regular Pentagon, given a radius.

18. Regular Pentagon, given a side.

19. Regular Hexagon, given a side

20. Regular Octagon, given a side

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