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

Table of contents

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[11.] Ad Librum Geometriæ.
[12.] DeLibro Geometriæ.
[13.] De Libro Geometriæ.
[14.] Ad Autorem Libri Geometriæ.
[15.] CAVALERII LIBER PRIMVS. In quo præcipuè de ſectionibus Cylindricorum, & Conicorum, nec non ſimilibus figuris quædam element aria præmittuntur; ac aliquæ Pro-poſitiones lemmaticæ pro ſequen-tibus Libris oſtenduntur. DIFINITIONES. A. I.
[16.] B.
[17.] C.
[18.] A. II.
[19.] B.
[20.] C.
[21.] D.
[22.] E.
[23.] SCHOLIVM.
[24.] III.
[25.] A. IV.
[26.] COROLLARIVM.
[27.] B.
[28.] V.
[29.] VI.
[30.] VII.
[31.] VIII.
[32.] IX.
[33.] SCHOLIVM.
[34.] A. X.
[35.] B.
[36.] C.
[37.] D. IV.
[38.] E.
[39.] APPENDIX PRIOR Pro explicatione Definit. 10. antecedentis.
[40.] A. XI.
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page |< < (21) of 569 > >|
THEOREMA V. PROPOS. VIII.
SI quilibet cylindricus ſecetur planis parallelis perlatera
ductis
conceptæ in cylindrico figuræ erunt parallelo-
gramma
æquiangula.
Sit quilibet cylindricus, BF, planis ſectus
16[Figure 16] parallelis per latera ductis, ſit autem vnius
in
cylindrico, AF, concepta figuræ paral-
lelogrammum
, BH, alterius autem paral-
lelogramma
, AN, QF.
Dico hæc eſſe
ęquiangula
, quod enim ſint parallelogram-
33ExCor. 6.
huius
.
ma, patet, quia plana ſecantia ducuntur per
latera
, quod verò fint æquiangula patet e-
tiam
, nam in parallelogrammo, AN, la-
tus
, AD, æquidiſtat lateri, BO, &
, AP,
ipſi
, BC, nam ſunt communes fectiones pla-
ni
, ABCR, &
æquidiftantium planorum,
AN
, BH, &
ideo angulus, PAD, æqua-
4410. Vnde-
cimi
Ele.
tur angulo, CBO, ergo parallelogramma, AN, BH, erunt

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