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

Table of contents

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[211.] D. SECTIO IV.
[212.] E. SECTIO V.
[213.] F. SECTIO VI.
[214.] G. SECTIO VII.
[215.] H. SECTIO VIII. ET VLTIMA.
[216.] COROLLARIVM I.
[217.] COROLLARIVM II.
[218.] THE OREMA XVIII. PROPOS. XVIII.
[219.] THE OREMA XIX. PROPOS. XIX.
[220.] COROLLARIVM I.
[221.] COROLLARIVM II.
[222.] LEMMA.
[223.] THE OREMA XX. PROPOS. XX.
[224.] COROLLARIVM.
[225.] THE OREMA XXI. PROPOS. XXI.
[226.] COROLLARIVM.
[227.] THE OREMA XXII. PROPOS. XXII.
[228.] A. COROLLARII SECTIO I.
[229.] B. SECTIO II.
[230.] C. SECTIO III.
[231.] D. SECTIO IV.
[232.] E. SECTIO V.
[233.] F. SECTIO VI.
[234.] THEOR EMA XXIII. PROPOS. XXIII.
[235.] A. COROLLARII SECTIO I.
[236.] B. SECTIO II.
[237.] C. SECTIO III.
[238.] D. SECTIO IV.
[239.] E. SECTIO V.
[240.] F. SECTIO VI.
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221201LIBER III. ad rectangulum ſub, BM, & , MOA, quod verum eſſe oſtendetur,
vt in antecedente, etiam ſi parallelogrammum, DN, non ſit circa
axim, vel diametrum, BM, vnde patet, &
c.
THEOREMA III. PROPOS. III.
SI intra circulum, velellipſim, duæ ad axim, vel diame-
trum ordinatim applicentur rectæ lineę, ſit autem paral-
lelogrammum, &
triangulum in eadem altitudine cum por-
tione inter applicatas concluſa, ſed in baſi altera applicata-
rum:
Omnia quadrata dicti parallelogrammia ad omnia qua-
drata concluſę portionis (regula baſi) erunt, vt rectangulum
ſub partibus axis, vel diametri per baſim conſtitutis ad re-
ctangulum ſub abſciſſa per baſim ab extremitate axis, vel
diametri, &
ſub compoſita ex medietate portionis axis, vel
diametri eiſdem applicatis intermedię, &
abſciſſa per aliam
applicatam ab eiuſdem extremitate, vna cum rectangulo ſub
eadem intermedia, &
ſub compoſita ex, @, eiuſdem, & , {1/2}, ab-
ſciſſæ per eandem applicatam ab eiuſdem extremitate:
Om-
nia verò quadrata incluſę portionis ad omnia quadrata dicti
trianguli erunt, vt rectangulum ſub compoſita ex abſciſſis ab
axi, vel diametro per ordinatim applicatas verſus terminum,
cui baſis propinquior eſt, &
ſub ſexquialtera abſciſſæ ab alio
extremo per applicatam, quę non eſt baſis, vna cum rectan-
gulo ſub huius reliqua, &
ſub dupla abſciſſę per baſim ab ex-
tremo, cui ipſa baſis propinquior eſt, ad rectangulum ſub
partibus axis, vel diametri per baſim conſtitutis.
Sit ergo circulus, velellipſis, ACDF,
134[Figure 134] centrum, O, axis, vel diameter, AD, duæ
ad ipſam ordinatim applicatæ ſint, IS, C
F, intercipientes portionem, ICFS, ſit
autem parallelogrammum, BF, in baſi
vtrauis applicatarum, vt in, CF, &
eadem
altitudine cum fruſto, CISF, ſit etiam
nunc circa axim, vel diametrum, MR, re-
gula verò, CF;
Dico ergo omnia quadra-
ta parallelogrammi, BF, ad omnia qua-
drata portionis, ICFS, eſſe vt rectangulum, DRA, ad

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