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 65
AF, AG: and be-cause AG, GF are greater (20. 1.) thanFA, that is than FH, for FA is equal toFH, both being from the same centre^ takeaway the common part FG; therefore theremainder AG is greater than the remain-der GH: but AG is equal to GD; there-fore GD is greater than GH, the less than the… … B PROP. XII. THEOR. If two circles touch each other externally, thestraight line which joins their centres shall pass throughthe point of contact. Let the two circles ABC, ADE touch each other externallyin the point A; and let F be the centre of the circle ABC, andG the centre of ADE: the straight…
Mathematics, Greek · Geometry · Trigonometry
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