| Hudson Square, the tetragon between Canal and West Houston Streets, from West Street to Sixth Avenue, was known in the early twentieth century as New York's printing and engraving district. |
| Thus we speak of a pentagon but not of a tetragon or a trigon, although both words are correct in form. |
| It is the tetragon with the Aragon bars, given as a shield of arms by James I. to the city he had conquered. |
| It was long, built around two sections of the tetragon, and with low divans beneath the view windows. |
| It is a tetragon, several stories high, with expanses of sheet glass, and it is right beside the river. |
| A figure that is bounded by four straight lines is termed a quadrangle, quadrilateral or tetragon. |
