PONCELET-STEINER Theorem??? Hi everyone, A friend of mine asked me if i knew of any place where he could find the proof to the Poncelet-Steiner Theorem, so since i knew of none, i thought someone here must know. The theorem's statement is as follows: All Euclidean geometric constructions can be carried out with a straightedge alone if, in addition, one is given the radius of a single circle and its center. So, if anyone could tell me a book, a website or something along those lines, where i could find the proof to that theorem i would appreciate it. All the best!