"A graphic editor created to draw geometric shapes."
Geometria is a totally free program, using a GPL licence. It is a graphic editor that lets you draw geometric shapes, and also solve geometric problems using examples.
With Geometria you can draw segments and angles, measure area and volume, convert, cut and join shapes. The shapes can be turned about themselves, and also rotated in different directions.
Geometria also comes equipped with various examples and problems, classified into 4 categories, so as to guide you when doing your own exercises.