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

Table of contents

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[321.] E. SECTIO V.
[322.] F. SECTIO VI.
[323.] THEOREMA XI. PROPOS. XII.
[324.] THEOREMA XII. PROPOS. XIII.
[325.] COROLLARIVM.
[326.] THEOREMA XIII. PROPOS. XIV.
[327.] COROLLARIVM.
[328.] THEOREMA XIV. PROPOS. XV.
[329.] ALITER.
[330.] THEOREMA XV. PROPOS. XVI.
[331.] THEOREMA XVI. PROPOS. XVII.
[332.] COROLLARIVM I.
[333.] COROLLARIVM II.
[334.] THEOREMA XVII. PROPOS. XVIII.
[335.] COROLLARIVM.
[336.] THEOREMA XVIII. PROPOS. XIX.
[337.] COROLLARIVM.
[338.] THEOREMA XIX. PROPOS. XX.
[339.] COROLLARIVM.
[340.] THEOREMA XX. PROPOS. XXI.
[341.] COROLLARIVM.
[342.] THEOREMA XXI. PROPOS. XXII.
[343.] THEOREMA XXII. PROPOS. XXIII.
[344.] THEOREMA XXIII. PROPOS. XXIV.
[345.] THEOREMA XXIV. PROPOS. XXV.
[346.] THEOREMA XXV. PROPOS. XXVI.
[347.] THEOREMA XXVI. PROPOS. XXVII.
[348.] THEOREMA XXVII. PROPOS. XXVIII.
[349.] THEOREMA XXVIII. PROPOS. XXIX.
[350.] THEOREMA XXIX. PROPOS. XXX.
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321301LIBER IV.
THEOREMA XII. PROPOS. XIII.
Sit ergo data parabola, HNB, inbaſi, HB, ſumpto autem vno
extremorum
punctorum, H, B, ipſius baſis, H B, vtipſum, H, ab
eo
ducatur vtcunq;
recta linea, HA, ſupra baſim, HB, & indefi-
nitè
producta curua, NAB, alia, HV, ſubterbàſim, vt ſint con-
ſtituta
ſegmenta, ANH, VBNH, ſit autem axis, vel diameter,
NO
, cui parallelæ ducantur per puncta, AV, verſus baſim, HB,
215[Figure 215] productam, ſi opus ſit, occur-
rentes
illi in punctis, X, C.
Dico ergo parabolam, HNB,
ad
ſegmentum, HN.
A, eſſe vt
cubus
, HB, ad cubum, HC.

Eandem
verò ad ſegmentum,
HNBV
, eſſe vt cubum, BH,
ad
cubum, HX, iungantur
puncta
, B, A;
B, N; N, H,
&
ſit, CE, tertia proportiona-
lis
duarum, quarum prima eſt
tripla
, CH, ſecunda autem ipſa, BC.
Quoniam ergo triangula,
11Coroll.1.
19
.huius.
NBH, BAH, ſunt in eadem baſi, BH, erunt inter ſe, vt altitu-
dines
, vel vt lineæ, quæ a verticibus, NA, ad baſes ductæ cum
eiſdem
æqualiter inclinantur .
i. triangulum, HNB, ad triangu-
lum
, HAB, erit vt, NO, ad, AC, .
i. vt rectangulum, HOB,
ad
rectangulum, HCB.
Inſuper triangulum, HNB, ad portion-
22Defin.12.
l
.1.
culam, ASB, habet rationem compoſitam ex ratione trianguli,
HNB
, ad triangulum, HAB, .
i. ex ratione rectanguli, HOB,
ad
rectangulum, HCB, &
ex ratione trianguli, HAB, ad

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