Archimedes, Archimedis De iis qvae vehvntvr in aqva libri dvo

Table of contents

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[11.] PROPOSITIO IIII.
[12.] PROPOSITIO V.
[13.] PROPOSITIO VI.
[14.] PROPOSITIO VII.
[15.] POSITIO II.
[16.] COMMENTARIVS.
[17.] PROPOSITIO VIII.
[18.] COMMENTARIVS.
[19.] PROPOSITIO IX.
[20.] COMMENTARIVS.
[21.] ARCHIMEDIS DE IIS QVAE VEHVNTVR IN AQVA LIBER SECVNDVS. CVM COMMENTARIIS FEDERICI COMMANDINI VRBINATIS. PROPOSITIO I.
[22.] PROPOSITIO II.
[23.] COMMENTARIVS.
[24.] PROPOSITIO III.
[25.] PROPOSITIO IIII.
[26.] COMMENTARIVS.
[27.] PROPOSITIO V.
[28.] COMMENTARIVS.
[29.] PROPOSITIO VI.
[30.] COMMENTARIVS.
[31.] LEMMAI.
[32.] LEMMA II.
[33.] LEMMA III.
[34.] LEMMA IIII.
[35.] PROPOSITIO VII.
[36.] PROPOSITIO VIII.
[37.] COMMENTARIVS.
[38.] PROPOSITIO IX.
[39.] COMMENTARIVS.
[40.] PROPOSITIO X.
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172FED. COMMANDINI Dico eas proportion ales eſſe in proportione, quæ eſt la-
teris a b adlatus d e, itaut earum maior ſit a b c e, me-
dia a d c e, &
minor d e f c. Quoniam enim lineæ d e,
a b æquidiſtant;
& interipſas ſunt triangula a b e, a d e;
erit triangulum a b e
126[Figure 126]111. ſextí. ad triangulum a d e,
ut linea a b ad lineam
d e.
ut autem triangu
lum a b e ad triangu-
lum a d e, ita pyramis
225. duodeci
mi.
a b e c ad pyramidem
a d e c:
habent enim
altitudinem eandem,
quæ eſt à puncto c ad
planum, in quo qua-
drilaterum a b e d.
er-
3311. quinti. go ut a b ad d e, ita pyramis a b e c ad pyramidem a d e c.
Rurſus quoniam æquidiſtantes ſunt a c, d f; erit eadem
ratione pyramis a d c e ad pyramidem c d f e, ut a c ad
444 ſexti. d f.
Sed ut a c a l d f, ita a b ad d e, quoniam triangula
a b c, d e f ſimilia ſunt, ex nona huius.
quare ut pyramis
a b c e ad pyramidem a d c e, ita pyramis a d c e ad ipſam
d e f c.
fruſtum igitur a b c d e f diuiditur in tres pyramides
proportionales in ea proportione, quæ eſt lateris a b ad d e
latus, &
earum maior eſt c a b e, media a d c e, & minor
d e f c.
quod demonſtrare oportebat.
PROBLEMA V. PROPOSITIO XXIIII.
Qvodlibet fruſtum pyramidis, uel coni,
uel coni portionis, plano baſi æquidiſtanti ita ſe-
care, ut ſectio ſit proportionalis inter maiorem,
&
minorem baſim.

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