The first six books of the Elements of Euclid, in which coloured diagrams and symbols are used instead of letters .. (1847)
Euclid, Byrne, Oliver · London, W. Pickering · leaf 136
Q. E. D. io4 BOOK III. PROP. XXI. THEOR. FIGURE I. … HE angles ( 4& 9 4^ ) in the famefegment of a circle are equal. FIGURE I.Let the fegment be greater than a femicircle, anddraw —^—^^— and ———— to the centre.
Geometry
Internet Archive · Thomas Fisher Rare Book Library · Public Domain Mark 1.0. Free to use for anything.
