Archimedes, Archimedis De iis qvae vehvntvr in aqva libri dvo

Table of contents

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[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.
[41.] COMMENTARIVS.
[42.] LEMMA I.
[43.] LEMMA II.
[44.] LEMMA III.
[45.] LEMMA IIII.
[46.] LEMMA V.
[47.] LEMMA VI.
[48.] II.
[49.] III.
[50.] IIII.
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134FED. COMMANDINI t u, x y ipſi g h æquidiſtare. Et quoniam triangula, quæ
fiunt
à lineis K y, y u, u s, s h æqualia ſuntinter ſe, &
ſimilia
triangulo
K m h:
habebit triangulum K m h ad triangulũ
1119. ſexti K δ y duplam proportionem eius, quæ eſt lineæ k h ad K y.
ſed _K_ h poſita eſt quadrupla ipſius k y. ergo triangulum
κ
m h ad triangulum _K_ δ y eãdem proportionem habebit,
quam
ſexdecim ad unũ &
ad quatuor triangula k δ y, y u,
u
s, s α h habebit eandem, quam fexdecim ad quatuor, hoc
eſt
quam h K ad κ y:
& ſimiliter eandem habere demonſtra
bitur
trian-
90[Figure 90] gulum κ m g
ad
quatuor
triãgula
K δ
x
, x γ t, t β r,
r
z g.
quare
222. uel 121
quinti
.
totum trian
gulum
K g h
ad
omnia tri
angula
g z r,
r
β t, t γ x, x δ
_K_
, K δ y, y u,
u
s, s α h ita
erit
, ut h κ a d
k
y, hoc eſt
ut
h m ad m
q
.
Si igitur in
triangulis
a b c, d e f deſcribantur figuræ ſimiles ei, quæ de-
ſcripta
eſt in g h K triangulo:
& per lineas ſibi reſp onden-
tes
plana ducantur:
totum priſma a f diuiſum eritin tria
ſolida
parallelepipeda y γ, u β, s z, quorum baſes ſunt æ qua
les
&
ſimiles ipſis parallelogrammis y γ, u β, s z: & in octo
priſmata
g z r, r β t, t γ x, x δ K, κ δ y, y u, u s, s α h:
quorum
item
baſes æquales, &
ſimiles ſunt dictis triangulis; altitu-
do
autem in omnibus, totius priſmatis altitudini æ qualis.

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