Commandino, Federico
,
Liber de centro gravitatis solidorum
,
1565
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<
s
id
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s.000517
">Sint duo priſmata ae, af, quorum eadem baſis quadri
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latera abcd:
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ſitq;
">ſitque</
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priſmatis ae altitudo eg; & priſmatis
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af altitudo fh. </
s
>
<
s
id
="
s.000518
">Dico priſma ae ad priſma af eam habere
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proportionem, quam eg ad fh. </
s
>
<
s
id
="
s.000519
">iungatur enim ac: & in
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unoquoque priſmate duo priſmata intelligantur, quorum
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lb
/>
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figure
id
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id.023.01.057.1.jpg
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xlink:href
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<
lb
/>
baſes ſint triangu
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lb
/>
la abc, acd. </
s
>
<
s
id
="
s.000520
">habe
<
lb
/>
bunt duo priſma
<
lb
/>
te in eadem baſi
<
lb
/>
abc conſtituta,
<
lb
/>
proportionem
<
expan
abbr
="
eã
">eam</
expan
>
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lb
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dem, quam ipſo
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lb
/>
rum altitudines e
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/>
g, fh, ex iam de
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monſtratis. </
s
>
<
s
id
="
s.000521
">& ſi
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militer alia duo,
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lb
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quæ ſunt in baſi a
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lb
/>
<
arrow.to.target
n
="
marg62
"/>
<
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/>
c d. </
s
>
<
s
id
="
s.000522
">quare totum priſma ae ad priſma af eandem propor
<
lb
/>
tionem habebit, quam altitudo eg ad fh altitudinem. </
s
>
<
lb
/>
<
s
id
="
s.000523
">Quòd cum priſmata ſint pyramidum tripla, & ipſæ pyrami
<
lb
/>
des, quarum eadem eſt baſis quadrilatera, & altitudo priſ
<
lb
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matum altitudini æqualis, eam inter ſe proportionem ha
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/>
bebunt, quam altitudines.</
s
>
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p
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margin
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<
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id
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s.000524
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id
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12. quinti</
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>
</
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>
<
p
type
="
main
">
<
s
id
="
s.000525
">Si uero priſmata baſes æquales habeant,
<
expan
abbr
="
nõ
">non</
expan
>
eaſdem, ſint
<
lb
/>
duo eiuſmodi priſmata ae, fl: & ſit baſis priſmatis ae qua
<
lb
/>
drilaterum abcd; & priſmatis fl quadrilaterum fghk. </
s
>
<
lb
/>
<
s
id
="
s.000526
">Dico priſma ae ad priſma fl ita eſſe, ut altitudo illius ad
<
lb
/>
huius altitudinem. </
s
>
<
s
id
="
s.000527
">nam ſi altitudo ſit eadem,
<
expan
abbr
="
intelligãtur
">intelligantur</
expan
>
<
lb
/>
<
arrow.to.target
n
="
marg63
"/>
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/>
duæ pyramides abcde, fghkl. </
s
>
<
s
id
="
s.000528
">quæ
<
expan
abbr
="
ĩtcrſe
">interſe</
expan
>
æquales
<
expan
abbr
="
erũt
">erunt</
expan
>
,
<
lb
/>
cum æquales baſes, & altitudinem eandem habeant. </
s
>
<
s
id
="
s.000529
">quare
<
lb
/>
<
arrow.to.target
n
="
marg64
"/>
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/>
& priſmata ae, fl, quæ ſunt
<
expan
abbr
="
harũ
">harum</
expan
>
pyramidum tripla, æqua
<
lb
/>
lia ſint neceſſe eſt. </
s
>
<
s
id
="
s.000530
">ex quibus perſpicue conſtat
<
expan
abbr
="
propoſitũ
">propoſitum</
expan
>
. </
s
>
<
lb
/>
<
s
id
="
s.000531
">Si uero altitudo priſmatis fl ſit maior, à priſmate fl ab
<
lb
/>
ſcindatur priſma fm, quod æque altum ſit,
<
expan
abbr
="
atq;
">atque</
expan
>
ipſum ae. </
s
>
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