1. Explore planar Euclidean geometry. KSEG allows you to interactively create a geometrical construction, similar to what you can do with a straight edge and compass. Points may be inserted on the page with right mouse-button clicks, and then used to form segments, lines, circles, or other geometrical objects. At any time you can drag existing points around, and watch how the constructed objects respond. See http://www.mit.edu/~ibaran/kseg.html for more info. From Debian 3.0r0 APT