Cavalieri, Buonaventura, Geometria indivisibilibvs continvorvm : noua quadam ratione promota

Table of contents

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[51.] PROBLEMA I. PROPOS. 1.
[52.] COROLLARIVM.
[53.] PROBLEMA II. PROPOS. II.
[54.] PROBLEMA III. PROPOS. III.
[55.] SCHOLIVM.
[56.] THEOREMA I. PROPOS. IV.
[57.] COROLLARIVM I.
[58.] COROLLARIVM II.
[59.] THEOREMA II. PROPOS. V.
[60.] THEOREMA III. PROPOS. VI.
[61.] COROLLARIVM.
[62.] THEOREMA IV. PROPOS. VII.
[63.] THEOREMA V. PROPOS. VIII.
[64.] COROLLARIV M.
[65.] THEOREMA VI. PROPOS. IX.
[66.] COROLLARIVM.
[67.] THEOREMA VII. PROPOS. X.
[68.] THEOREMA VIII. PROPOS. XI.
[69.] COROLLARIV M.
[70.] LEMMA PRO ANTECED. PROP.
[71.] THEOREMA IX. PROPOS. XII.
[72.] COROLLARIV M.
[73.] THEOREMA X. PROPOS. XIII.
[74.] THEOREMA XI. PROPOS. XIV.
[75.] THEOREMA XII. PROPOS. XV.
[76.] SCHOLIVM.
[77.] THEOREMA XIII. PROPOS. XVI.
[78.] COROLLARIVM.
[79.] THEOREMA XIV. PROPOS. XVII.
[80.] COROLLARIVM.
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266GEOMETRIÆ
IX.
SImiles portiones ſpherarum, vel ſpęroidum, & ſimiles
Conoides, ſiue Conoidum portiones appellabimus,
quando per axes ductis planis ad rectos angulos baſibus
conceptę in eiſdem ſolidis figurę ſimiles erunt (iuxta de-
finit.
10. ſubſequentem, vel etiam iuxta aliorum definitio-
nes de ſimilibus figuris planis allatas, ſubintellige) qua-
rum, &
baſium communes ſectiones ſint homologe baſium
diametri, quę vel circuliſint, vel ſimiles ellipſes.
SCHOLIVM.
_C_Aetræ d finitiones ab Euclide ſimilium planarum figurarum,
&
ſolidarum, & ſimilium Cylindrorum, & Conorum, & quæ
ab Apollonio lib.
6. Conicorum, referente Eutocio, fiunt ſimilium ſe-
ctionum Coniportionum, ſumantur, vt abipſis afferuntur, adtuncto
tamen definitioni ſimilium ſectionum Coni portionum ibidem ab Apol-
lonio allatæ, ſi pro ſpatijs vſurpetur quam infr a dicetur.
A. X.
11A
SImiles figurę planę in vniuerſum vocentur, in quarum
ſingulis oppoſitę tangentes ita duci poſlunt, &
in eaſ-
dem tangentes ita incidere ad eundem angulum, ex eadem
parte rectę lineæ in illis terminatę, vt, ſi intra dictas op-
poſitas tangentes eiſdem æquidiſtantes vtcumq;
ductę fue
rint rectę lineæ, eas, quę incidunt dictis tangentibus, ſimi-
liter ad eandem partem ſecantes;
reperiamus harum paral-
lelarum, nec non &
oppoſitarum tangentium eas portiones,
quę inter dictas incidentes, &
circuitus figurarum ad ean-
dem partem ſitę funt, eodem ordine ſumptas, eandem inter
ſe rationem habere, quam rectæ lineæ, quę dictis tangenti-
bus inciderunt, &
in eaſdem terminantur.
B.
22B
IPſę autem quę dictis tangentibus incidunt, & in easter-
minantur, dicentur;
Incidentes dictarum tangentium
oppoſitarum, &
figurarum.

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