Geometer's Sketchpad allows the you to save "tools" so that you can save frequently used constructions.

Several common and useful ones are presented here.

1. Trisected line segment

2. Isoceles triangle

3. Square given a side

4. Centroid

5. Triangle

6. Orthocenter

7. Circumcenter

8. Circumcircle

9. Incenter

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