Steiner's theorems on the complete quadrilateral - Jean-Pierre Ehrmann We give a translation of Jacob Steiner's 1828 note on the complete quadrilateral, with complete proofs and annotations in barycentric coordinates. ✪ ✪ ✪ ✪ ✪ Hidden Content: **Hidden Content: Content of this hidden block can only be seen by members of (usergroups: V.I.P Downloader).** Theo LTTK Education