Full text: Cavalieri, Bonaventura: Geometria indivisibilibvs continvorvm

152. CAVALER II
LIBER SECVNDVS.

In quo de Triangulo præcipuè, & Parallelogram-
mo, ac Solidis ab eiſdem genitis plura de-
monſtrantur, necnon aliæ quædam
Propoſitiones lemmaticæ pro ſe-
quentibus Libris oſten-
duntur.

153. DIFINITIONES.
I.

SI per oppoſitas tangentes cuiuſcunq; da-
tæ planæ figuræ ducantur duo plana in-
uicem parallela, recta, ſiue inclinata ad
planum datæ figuræ, hinc inde indefini-
tè producta; quorum alterum moueatur
verſus reliquum eidem ſemper æquidi-
ſtans donec illi congruerit: ſingulæ re-
ctæ lineæ, quæ in toto motu fiunt com-
munes ſectiones plani moti, & datæ figuræ, ſimul collectæ
vocentur: Omnes lineæ talis figuræ, ſumptæ regula vna ea-
rundem; & hoc cum plana ſunt recta ad datam figuram: Cum
verò ad illam ſunt inclinata vocentur. Omnes lineę eiuſdem
obliqui tranſitus datæ figuræ, regula pariter earundem vna; libeat tamen, cum expediet, etiam prædictas vocare, recti
tranſitus, ſicuti has, obliqui tanſitus, eius nempè, qui fit in
tali ęquidiſtãtium planorum ad datam figuram inclinatione.

153.1.

Poſt Se-
cund. lib.
1.
E. Defin.
Sec. lib. 1.

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