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Euclid: Elementa

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Click to Expand/Collapse OptionTitle
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gre ΙΙI,7
Ἐὰν κύκλου ἐπὶ τῆς διαμέτρου ληφθῇ τι σημεῖον, ὃ μή ἐστι κέντρον τοῦ κύκλου, ἀπὸ δὲ τοῦ σημείου πρὸς τὸν κύκλον προσπίπτωσιν εὐθεῖαί τινες, μεγίστη μὲν ἔσται, ἐφ᾽ ἧς τὸ κέντρον, ἐλαχίστη δὲ ἡ λοιπή, τῶν δὲ ἄλλων ἀεὶ ἡ ἔγγιον τῆς διὰ τοῦ κέντρου τῆς ἀπώτερον μείζων ἐστίν, δύο δὲ μόνον ἴσαι ἀπὸ τοῦ σημείου προσπεσοῦνται πρὸς τὸν κύκλον ἐφ᾽ ἑκάτερα τῆς ἐλαχίστης.
Pic2519
eng
If on the diameter of a circle a point be taken which is not the centre of the circle, and from the point straight lines fall upon the circle, that will be greatest on which the centre is, the remainder of the same diameter will be least, and of the rest the nearer to the straight line through the centre is always greater than the more remote, and only two equal straight lines will fall from the point on the circle, one on each side of the least straight line.
lat Sic
Si in circuli diametro sumatur punctus aliquis qui non sit centrum circuli, a puncto autem ad circulum accidant recte alique, maxima quidem erit in qua centrum, minima vero reliqua. Aliarum autem semper que propinquior ei que per centrum remotiore maior est. Due vero solum recte equales ab eodem puncto accidunt ad circulum in utrasque minime.
lat Gerard
Si super diametrum circuli punctum signetur quod sit extra centrum et protrahantur ab eo linee pervenientes ad circumferentiam, longior eis erit linea que transit per centrum et minor illis lineis est que ab illo puncto protracta complet diametrum. Que autem linee que per centrum transit propinquior est, illa est longior que magis elongatur ab ea una post aliam ordinatim; due quoque linee tantum que sunt ab utraque parte minoris linee sunt equales.
lat Adelard 48r
Si supra diametrum circuli punctus alius a centro assignatus fuerit a quo linee usque ad circumferentiam extracte fuerint, erit linea supra centrum transiens omnium longissima lineaque diametro addita omnium brevissima, que vero linee supra centrum transeunti propinquiores reliquis longiores et que ei remotiores reliquis breviores dueque linee que ex utroque latere brevissime linee sunt equales.
lat Hermann 19v
Si in diametro circuli punctus preter centrum signetur et ab eo ad circumferenciam quotlibet linee ducantur, que per centrum transierit, longissima erit. Quo vero de diametro remanserit brevissima. Scite quantum ad centrum accedunt, tanto longiores, quantumque recedunt, tanto breviores. Due demumque brevissime utrimque equaliter astant, sibi invicem equales erunt.
ara Uppsala
No Arabic
ara Tuṣi
No Arabic
ara Nairizi
No Arabic
san
No Sanskrit
lat Clavius
SI in diametro circuli quodpiam sumatur punctum, quod circuli centrum non sit, ab eoque puncto in circulum quædam rectæ lineæ cadant: Maxima quidem erit ea, in qua centrum, minima verò reliqua; aliarũ verò propinquior illi, quæper centrum ducitur, remotiore semper maior est: Duæ autem solùm rectæ lineæ æquales ab eodem puncto in circulum cadunt, ad vtrasque partes minimæ, vel maximæ.
kin 幾何原本 p. 126
圜徑離心。任取一點。從點至圜界。任出幾線。其過心線、最大。不過心線、最小。餘線愈大。愈近不過心線者、愈小。而諸線中、止兩線等。
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