The elements of Euclid : viz, the first six books, together with the eleventh and twelfth : the errors, by which Theon, or others, have long ago vitiated these books, are corrected, and some of Euclid's demonstrations are restored : also, The book of Euclid's data, in like manner corrected (1834)
Euclid, Euclid, Simson, Robert, 1687-1768 · Philadelphia : Desilver & Thomas · leaf 57
when it meets the circle,and being produced does not cut It. III. Circles are said to touch one ano-ther, which meet, but do not cutone another. IV. Straight lines are said to be equally distantfrom the centre of a circle, when the per-pendiculars drawn to them from the cen-tre are equal. V. And…
Mathematics, Greek · Geometry · Trigonometry
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