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Euclid: Elementa

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gre ΙΙI,3
Ἐὰν ἐν κύκλῳ εὐθεῖά τις διὰ τοῦ κέντρου εὐθεῖάν τινα μὴ διὰ τοῦ κέντρου δίχα τέμνῃ, καὶ πρὸς ὀρθὰς αὐτὴν τέμνει: καὶ ἐὰν πρὸς ὀρθὰς αὐτὴν τέμνῃ, καὶ δίχα αὐτὴν τέμνει.
Pic2514
eng
If in a circle a straight line through the centre bisect a straight line not through the centre, it also cuts it at right angles; and if it cut it at right angles, it also bisects it.
lat Sic
Si in circulo recta aliqua per centrum rectam aliquam non per centrum in duo equalia secet, et ad rectos eam secat. Et si ad rectos ipsam secet, et in duo equalia eam secat.
lat Gerard
Si in circulo ceciderit linea que per centrum non transeat quam alia linea per centrum transiens in duo media partiatur, tunc secat eam super rectos angulos. Et si super rectos angulos eam dividit, tunc in duo media eam partitur.
lat Adelard 47v
Si infra circulum linea ceciderit supra centrum non transiens et a centro linea exeat predictam in duo media dividens, supra angulum rectum eam dividere necesse est. Et si diviserit eam super angulum rectum, in duo media dividere necesse est.1
1. The last sentence is not in MS-BNP
lat Hermann 19r
Si lineam intra circulum preter centrum ductam alia a centro veniens per medium secat, rectis angulis super eam insistere, sique rectis angulis per equalia dividere necesse est.
ara Uppsala 28v22-24
اذا وقع في دايرة علي غير المركز وتر وخرج من المركز خط فقطع الوتر بنصفين فانه يقطعه علي زوايا قايمة علي وان قطعه علي زوايا قايمة فانه يقطعه بنصفين❊
ara Tuṣi p. 49
كل وتر خرج اليه من المركز خط فان نصفه فهو عمود عليه وان كان عمودا عليه فهو قد نصفه *
ara Nairizi p. 12
اذا اُجيز على مركز دائرة خط مستقيم فقطع خطًا اخر مستقيما ليس على المركز بنصفين فانه يقطَعُه على زوايا قائمة وأن قَطَعَهُ على زوايا قائمة فإنّه يقطعه بنصفين
san p. 95
tatra vṛtte pūrṇajīvāyāṃ kendrān nisṛtarekhā saṃpātaṃ kariṣyati | yadi sā kendragā rekhā pūrṇajyārddhaṃ karoti tadā saiva lambaḥ | yadīyaṃ rekhā lambarūpā bhavati tadā pūrṇajyāyā arddhaṃ kariṣyati |
lat Clavius p. 101
SI in circulo recta quaedam linea per centrum extensa quandam non per centrum extensam bifariam secet; et ad angulos rectos ipsam secabit. Et si ad angulos rectos eam secet, bifariam quoque eam secabit.
kin 幾何原本 卷三,三
直線過圜心。分他直線為兩平分。其分處必為兩直角。為兩直角。必兩平分。
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