The first six books of the elements of Euclid, in which coloured diagrams and symbols are used instead of letters for the greater ease of learners (1847)
Byrne, Oliver, Whittingham, Charles, 1795-1876, Chiswick Press · London : William Pickering · leaf 156
II. A FIGURE is faid to be defcribed about another figure, whenall the fides of the circumfcribed figure pafs through theangular points of the other figure. III. A RECTILINEAR figure is faid to beinfcribed in a circle, when the vertexof each angle of the figure is in thecircumference of the circle.… … 124 BOOK IF. DEFINITIONS. V.
Euclid's Elements · Geometry
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.
