This page uses JavaSketchpad, a World-Wide-Web component of The Geometer's Sketchpad. Copyright © 1990-2001 by KCP Technologies, Inc. Licensed only for non-commercial use.

Sorry, this page requires a Java-compatible web browser.


"Incenter" is often regarded as merely a point, but, as illustrated here, "incenter" is really a function - whose domain is the set of all triangles. In this case, the incenter is evaluated at the four triangles: BCD, CDA, DAB, ABC.

For more, see GEOMETRY IN ACTION, Chapter 7.