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

Table of contents

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[411.] THEOREMA V. PROPOS. V.
[412.] COROLLARIV M.
[413.] THEOREMA VI. PROPOS. VI.
[414.] COROLLARIV M.
[415.] THEOREMA VII. PROPOS. VII.
[416.] THEOREMA VIII. PROPOS. VIII.
[417.] SCHOLIV M.
[418.] PROBLEMA I. PROPOS. IX.
[419.] THEOREMAIX. PROPOS. X.
[420.] COROLLARIV M.
[421.] THEOREMA X. PROPOS. XI.
[422.] COROLLARIV M.
[423.] THEOREMA XI. PROPOS. XII.
[424.] THEOREMA XII. PROPOS. XIII.
[425.] THEOREMA XIII. PROPOS. XIV.
[426.] THEOREMA XIV. PROPOS. XV.
[427.] THEOREMA XV. PROPOS. XVI.
[428.] THEOREMA XVI. PROPOS. XVII.
[429.] COROLLARIVM.
[430.] THEOREMA XVII. PROPOS. XVIII.
[431.] THEOREMA XVIII. PROPOS. XIX.
[432.] A. COROLL. SECTIO I.
[433.] B. SECTIO II.
[434.] C. SECTIO III.
[435.] D. SECTIO IV.
[436.] E. SECTIO V.
[437.] SCHOLIV M.
[438.] THEOREMA XIX. PROPOS. XX.
[439.] COROLLARIVM.
[440.] THEOREMA XX. PROPOS. XXI.
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327307LIBER IV. eorundem cubi ſunt æquales, ergo parabola, DAF, erit æqualis
parabolæ, MHFC, quod oſtendere opuserat.
COROLLARIVM.
_H_Inc patet, ſi diametri, AR, HO, vel axis, & diameter ſint æquà-
les, etiam, DF, XC, eſſe ęquales, nam oſtenſum eſt, QC, eſſe æqualem
ipſi, RF, eſt autem, XC, dupla, CQ &
, DF, dupla, FR, ideò etiam,
XC, DF, ſunt, æquales.
THEOREMA XVII. PROPOS. XVIII.
EXpoſita ſemiparabola cum dimidia baſi, & axi, vel
diametro totius, &
completo parallelogrammo ſub
dicto axi, vel diametro.
& ſemibaſi, deſcriptaque ellipſis
quarta, vel circuli circa axem vel diametrum, &
ſemi-
baſim dictam, tanquam circa ſemiaxes, vel ſemidiame-
tros coniugatas integræ ellipſis, vel circuli;
ſi deinde ſu-
matur vtcunque punctum in ſemibaſi, per quod ducatur
recta linea ad oppoſitum latus parallelogrammi paralle-
la dictæ axi, vel diametro, portio huius inter ſemibaſim,
&
curuam ellipſis, vel circuli incluſa, erit media propor-
tionalis inter incluſam oppoſitis lateribus parallelogram-
mi iam dicti, &
eadem ſemibaſi, ac curua parabolæ. Si
verò ſumatur punctum in axi, vel diametro iam dicta,
&
per ipſum ducatur ſemibaſi parallela, producta vſq; ad
latus oppoſitum parallelogrammi iam dicti, &
iungantur
extrema puncta curuæ parabolæ recta linea, huius portio
incluſa inter axim, vel diametrum dictam, &
curuam pa-
rabolæ, erit media proportionalis inter eam, quæ inclu-
ditur lateribus oppoſitis dicti parallelogrammi, &
eam,
quæ includitur lateribus trianguli ſub dicta axi, vel diame-
tro, &
dicta ſemibaſi conſtituti.
219[Figure 219]

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