Viviani's theorem

Vincenzo Viviani (1622-1703)

The following applet illustrates Viviani's Theorem. Be sure to move the ORANGE POINT and the BIG RED POINTS anywhere you'd like prior to (and even after) you start dragging the slider. Carry out this action as many times as you'd like. Describe Viviani's Theorem in your own words. That is, write a conditional statement that conveys what this applet illustrates.