Triangle Geometry

There are many remarkable points, lines and circles in the simplest of all polygonal shapes - the triangle. You may investigate some of them by clicking on the button below.

The applet is made to display various elements of triangle geometry relative to a reference triangle or several of its derivatives, e.g, the anticomplementary or the medial triangles. Some elements play a double role and appear under different names in different triangles.

This applet requires Sun's Java VM 2 which your browser may perceive as a popup. Which it is not. If you want to see the applet work, visit Sun's website at, download and install Java VM and enjoy the applet.

What if applet does not run?

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