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

Table of contents

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[461.] B. SECTIO II.
[462.] C. SECTIO III.
[463.] D. SECTIO IV.
[464.] E. SECTIO V.
[465.] THEOREMA XXIX. PROPOS. XXXI.
[466.] THEOREMA XXX. PROPOS. XXXII.
[467.] COROLLARIVM.
[468.] THEOREMA XXXI. PROPOS. XXXIII.
[469.] THEOREMA XXXII. PROPOS. XXXIV.
[470.] COROLLARIVM.
[471.] THEOREMA XXXIII. PROPOS. XXXV.
[472.] COROLLARIVM.
[473.] THEOREMA XXXIV. PROPOS. XXXVI.
[474.] THEOREMA XXXV. PROPOS. XXXVII.
[475.] THEOREMA XXXVI. PROP. XXXVIII.
[476.] THEOREMA XXXVII. PROP. XXXIX.
[477.] THEOREMA XXXVIII. PROP. XL.
[478.] COROLLARIVM.
[479.] THEOREMA XXXIX. PROPOS. XLI
[480.] THEOREMA XL. PROPOS. XLII.
[481.] THEOREMA XLI. PROPOS. XLIII.
[482.] THEOREMA XLII. PROPOS. XLIV.
[483.] THEOREMA XLIII. PROP. XLV.
[484.] THEOREMA XLIV. PROP. XLVI.
[485.] THEOREMA XLV. PROP. XLVII.
[486.] THEOREMA XLVI. PROPOS. XLVIII.
[487.] THEOREMA XLVII. PROPOS. XLIX.
[488.] THEOREMA XLVIII. PROPOS. L.
[489.] THEOREMA XLIX. PROPOS. LI.
[490.] SCHOLIVM.
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348328GEOMETRIÆ bus quadratis, BF, ad omnia quadrata, AF, vt 11. ad 24. ergo,
exæquali, omnia quadrata figuræ, CBDF, demptis omnibus qua-
dratis BF, ad omnia quadrata, BF, demptis omnibus quadratis tri-
linei, BCF, erunt vt 11.
ad 5. quod erat oſtendendum.
THEOREMA XXXII. PROPOS. XXXIV.
ASſumpta eadem anteced. Theor. figura, ſiproducatur
baſis, DF, (quæ retineatur pro regula) vtcunq;
in,
M, &
per M, ipſi, BE, parallela ducatur, MH, cui occur-
rat, AC, producta, in ipſo, H.
Omnia quadrata, AM,
demptis omnibus quadratis, CM, ad omnia quadrata figu-
ræ, HBDM, demptis omnibus quadratis quadrilinei, H
BFM, erunt vt, AF, ad parabolam, DBF, ideſt erunt
eorum ſexquialtera:
Quod facilè patebit, quia parabola, D
BF, inſcripta parallegrammo, AF, eſt figura, qualem po-
ſtulat Propoſit.
30. Lib. 3. Vlterius autem dico omnia qua-
drat’a, AM, ad omnia quadrata figuræ, BDMH, eſſe vt
quadratum, DM, ad quadratum, ME, dimidium qua-
drati, ED, cum rectangulo ſub ſexquitértia, DE, &

ſub, EM.
In conſtructa figura igitur omnia quadrata figuræ, HBDM, per
rectam, BE, diuiduntur in omnia quadrata ſemiparabolæ, BDC,
in omnia quadrata, BM, &
in rectangula bis ſub ſemiparabola, B
11D. 23. l. 2. DE, &
ſub EH, nunc ad horum ſingula comparemus omnia qua-
235[Figure 235] drata, AM:
Om-
nia igitur quadr@@-
ta, AM, ad om-
nia quadrata, BM,
ſunt vt quadra-
tum, DM, ad
quadratum, ME,
quod ſerua.
Item
omnia quadrata,
AM, ad omnia quadrata, AE, ſunt vt quadratum, MD, ad qua-
dratum, DE, omnia verò quadrata, AE, ſunt dupla omnium qua-
dratorum ſemiparabolæ, BDE, ergo omnia quadrata, AM, ad
omnia quadrata ſemiparabolæ, BDE, ſunt vt quadratum, MD,
ad dimidium quadrati, DE, quod etiam ſerua.
Tandem

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