CONTROLS:
< and > change which vertex of the triangle is selected
Arrows + holding X drags the selected vertex
O switches between medians, altitudes, angle bisectors, and perpendicular bisectors being drawn.
Here's a little toy I made to show my class the concurrency of the special segments in a triangle. I'll ty to update it with some more notation (though automatically drawing tick marks and right angles and such will require some work( and possibly even highlight the various points of concurrency.
For now though, it's a neat toy to let students notice this peculiar behavior of special segments in a triangle, that the three lines concur at a point.
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