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 96
BOOK 11. PROP. IX. THEOR. F a Jlraightline be dividedinto two equalparts ^— —,.j y 63 and alfo into two unequal parts ^mmm^^^m— ^ the fquares of the unequal parts are together double the fquares of half the line, and of the part between the points offedlion. ^ + ^= 2 ^ + 2 … Make —■ _L and r= — Draw ..-.—«— and — II ,—II or and draw
Euclid's Elements · Geometry
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