1 KSEG is a Free (GPL) interactive geometry program for exploring
2 Euclidean geometry. It runs on Unix-based platforms (according to users,
3 it also compiles and runs on Mac OS X and should run on anything that Qt
4 supports). You create a construction, such as a triangle with a circumcenter,
5 and then, as you drag verteces of the triangle, you can see the circumcenter