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Apollonii Pergaei quae graece exstant cum ... - Wilbourhall.org

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et<br />

^SK : ANS<br />

EH' : ZH^<br />

CONICORUM LIBER III. 411<br />

= KA^ : AN^<br />

[Eucl. VI, 19]<br />

[Eucl. VI, 2; VI, 4; V, 12; V, 16],<br />

z/02;:^z/M=0z/2: z/M^ [Eucl. VI, 19]<br />

^EA'':^^^ [Eucl. VI, 4].<br />

ergo etiam EH:HZ = ^z/ : z/Z.<br />

XL.<br />

lisdem positis si per punctum concursus contingentium<br />

recta ducitur rectae puncta contactus coniungenti<br />

parallela, et recta a media recta puncta<br />

contactus<br />

coniungenti ducta utramque sectionem secat<br />

rectamque rectae puncta contactus coniungenti parallelam,<br />

erunt, ut tota recta ita ducta ad partem extrinsecus<br />

inter parallelam sectionemque abscisam, ita<br />

partes rectae a sectionibus rectaque puncta contactus<br />

coniungenti<br />

effectae.<br />

sint oppositae A, 5, quarum centrum sit F, contingentes<br />

autem A/i, z/5, et ducantur ^5 et r/IE\<br />

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