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 131
es not cut the circle. Becaufe H^ =: | ^ , .*. ^^ is an acute angle ; fuppofe..........4.... _L .-■«•-•-, drawn from the centre of the circle, it mufl; fall at the fide of ^^ the acute angle.,*, B^^ which is fuppofed to be a right angle, is C ^^; but ............ = , and .*, --••••.. ^ ......«..■—,…
Euclid's Elements · Geometry
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