Mystery Point!

Everyone knows their Triangle Centers! In the triangle below are hidden 8 Mystery Points! Some are the Classical Triangle Centers. Others are constructed in different ways.

Click on the check box to reveal each Mystery Point one at a time. By dragging the vertices or by constructions using the limited toolbar, determine how each Mystery Point was constructed!

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Classical Triangle Centers:
Centroid - Medians
Circumcenter - Perpendicular Bisectors
Orthocenter - Altitudes
Incenter - Angle Bisectors

Steve Phelps, Created with GeoGebra