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

Table of contents

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[181.] THEOREMA V. PROPOS. V.
[182.] THEOREMA VI. PROPOS. VI.
[183.] THEOREMA VII. PROPOS. VII.
[184.] THEOREMA VIII. PROPOS. VIII.
[185.] COROLLARIVM.
[186.] THEOREMA IX. PROPOS. IX.
[187.] COROLLARIVM.
[188.] THEOREMA X. PROPOS. X.
[189.] COROLLARIVM.
[190.] THEOREMA XI. PROPOS. XI.
[191.] COROLLARIVM.
[192.] THEOREMA XII. PROPOS. XII.
[193.] COROLLARIVM.
[194.] THEOREMA XIII. PROPOS. XIII.
[195.] COROLLARIVM.
[196.] THEOREMA XIV. PROPOS. XIV.
[197.] COROLLARIVM.
[198.] THEOREMA XV. PROPOS. XV.
[199.] A. DEMONSTRATIONIS SECTIO I.
[200.] B. SECTIO SECVNDA.
[201.] C. SECTIO III.
[202.] D. SECTIO IV.
[203.] E. SECTIO V. ET VLTIMA.
[204.] COROLLARIVM I.
[205.] COROLLARIVM II.
[206.] THEOREMA XVI. PROPOS. XVI.
[207.] SCHOLIV M.
[208.] THEOREMA XVII. PROPOS. XVII.
[209.] A. DEMONSTRATIONIS SECTIO I.
[210.] B. SECTIO II.
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315295LIBER IV.
COROLLARIV M.
_H_Inc patet, quod, diuidendo, portio parabolæ, SGAT, ad por-
tionem, SHT, erit bt omnia quadrata ſemiportionis, AMVT,
ad omnia quadrata ſemiportionis, HVT, .
ſ. bt parallelepipedum ſub
altitudine linea compoſita ex, OH, HT, baſi quadrato, TA, ad paral-
lelepipedum ſub altitudine, XT, baſi quadrato, HT, bt patet in Coroll.
ſupradictæ Propoſ. 6. eiuſdem Libri 3.
THEOREMA VII. PROPOS. VII.
SI duæ ad baſim parabolæ applicentur vtcunque rectæ li-
neæ, abſciſſæ portiones parabolæ eruntinterſe, vt pa-
rallelepipeda ſub baſibus quadratis abſciſſarum à baſi per
eaſdem applicatas ab eadem extremitate, à qua portiones
abſciſſæ intelliguntur, altitudinibus compoſitis ex reſiduis
dictæ baſis (demptis abſciſſis) &
dimidia totius.
Sit ergo parabola, HGA, in baſi, HA, ad quam ordinatim ap-
plicentur duæ vtcunque lineæ, ST, RV, abſcindentes portiones, R
209[Figure 209] HV, SHT.
Dico portionem, RHV, ad
portionem, SHT, eſſe (ſi producatur, AX,
æqualis ipſius baſis, AH, medietati) vt pa-
rallelepipedum ſub altitudine, XV, baſi qua-
drato, VH, ad parallelepipedum ſub altitudi-
ne, XT, baſi quadrato, TH.
Eſt enim por-
tio, RHV, ad parabolam, AGH, vt paral-
lelepipedum ſub altitudine, XV, baſi quadra-
11Exantec. to, VH, ad parallelepipedum ſub altitudine,
XA, baſi quadrato, AH, item parabola, A
GH, ad portionem, HST, eſt vt parallele-
pipedum ſub altitudine, XA, baſi quadrato,
AH, ad parall elepipedum ſub altitudine, XT,
baſi quadrato, TH, ergo exæquali portio, R
HV, ad portionem, SHT, eſt vt parallele-
pipedum ſub altitudine, XV, baſi quadrato,
VH, ad parallelepipedum ſub altitudine, X
T, baſi quadrato, TH, quod oſtendere opor-
tebar.

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