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 18
and common and ^ = -^ (B. I. pr. 4.)Again in >^ and N. t ^ xvi INTRODUCTION. and ^ = ^; and ^^^ ^ ^^^ (B. i. pr. 4). But C^E. D. By annexing Letters to the Diagratn. Let the equal fides AB and AC be produced through theextremities BC, of the third Tide, and in the produced partBD of either, let…
Euclid's Elements · Geometry
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