DelMonte, Guidubaldo
,
In duos Archimedis aequeponderantium libros Paraphrasis : scholijs illustrata
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<
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N10019
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xlink:href
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077/01/107.jpg
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pagenum
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103
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<
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Sit triangulum ABC, &
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italics
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ab angulo A
<
emph
type
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italics
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ducatur AD ad dimi
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diam BC. BE verò
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italics
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ab angulo B
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ad dimidiam AC.
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emph.end
type
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italics
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quę quidem
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lineę AD BE ſeinuicem ſecent in
<
expan
abbr
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pū
">pum</
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<
lb
/>
<
arrow.to.target
n
="
fig47
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cto H.
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emph
type
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italics
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Quoniam igitur centrum grauita
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tis trianguli ABC est in vtra〈que〉 linea
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AD BE; hoc enim demonstratum eſt
<
emph.end
type
="
italics
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in
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lb
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pręcedenti. </
s
>
<
s
id
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N13E34
">erit vti〈que〉 centrum graui
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lb
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tatis, vbilineç AD BE ſe
<
expan
abbr
="
inuicẽ
">inuicem</
expan
>
<
expan
abbr
="
ſecãt
">ſecant</
expan
>
.
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lb
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ſecant verò ſeſe in H.
<
emph
type
="
italics
"/>
ergo punctum
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H centrum eſt grauitatis
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emph.end
type
="
italics
"/>
trianguli ABC.
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quod demonſtrare oportebat. </
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<
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id.077.01.107.1.jpg
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xlink:href
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077/01/107/1.jpg
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number
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66
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<
p
id
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N13E50
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type
="
head
">
<
s
id
="
N13E52
">SCHOLIVM.</
s
>
</
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p
id
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N13E54
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type
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main
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<
s
id
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N13E56
">Similiter ſi ducta fuerit CH, & producta, bifariam ſecaret
<
lb
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AB. In hac enim linea eſſet centrum grauitatis trianguli;
<
expan
abbr
="
cẽ
">cem</
expan
>
<
lb
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trum verò eſt in linea ab angulo ad dimidiam baſim ducta:
<
lb
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ergo hæc linea ab angulo C ad dimidiam AB ducta eſſet.
<
lb
/>
Præterea ſi linea à puncto C ad dimidiam AB ducta
<
expan
abbr
="
nõ
">non</
expan
>
tran
<
lb
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ſiret per H; eſſet vti〈que〉 in hac linea centrum grauitatis;
<
arrow.to.target
n
="
marg158
"/>
<
expan
abbr
="
cẽ-trum
">cen
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lb
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trum</
expan
>
quo〈que〉 grauitatis eſt in linea AD, & in linea BE, ut in
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lb
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H; vnius igitur figurę plura darentur centra grauitatis. </
s
>
<
s
id
="
N13E76
">quod
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lb
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fieri non poteſt. </
s
>
<
s
id
="
N13E7A
">quod quidem, cùm ſit in con ueniens, nos in
<
lb
/>
noſtro Mechanicorum libro dari non poſſe ſuppoſuimus.
<
lb
/>
Quare linea CH indirectum ducta, bifariam ſecaret AB.
<
lb
/>
quod quidem paulò infra aliter quo〈que〉 oſtendemus,
<
expan
abbr
="
nõnul
">nonnul</
expan
>
<
lb
/>
lis prius demonſtratis; quæ Archimedes ob ſe〈que〉ntem
<
expan
abbr
="
demõ-ſtrationem
">demon
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lb
/>
ſtrationem</
expan
>
, tanquam demonſtrata ſupponit. </
s
>
<
s
id
="
N13E8E
">Vult enim Ar
<
lb
/>
chimedes, poſtquam inuenit centrum grauitatis cuiuſlibet
<
lb
/>
trianguli, centrum quo〈que〉 grauitatis quærere trapetij duo la
<
lb
/>
tera ęquidiſtantia habentis. </
s
>
<
s
id
="
N13E96
">quod eſt quidem pars trianguli,
<
lb
/>
& tanquam fruſtum a triangulo abſciſſum. </
s
>
<
s
id
="
N13E9A
">ſupponitquè den
<
lb
/>
trum grauitatis cuiuſlibet trianguli eſſe in recta linea baſi du
<
lb
/>
cta ęquidiſtante, quæ latera ita diuidat, vt partes ad uerticem
<
lb
/>
ſint reliquarum partium duplæ. </
s
>
<
s
id
="
N13EA2
">quod quidem ortum ducit
<
lb
/>
ex cognitione alterius theorematis oſtendentis centrum </
s
>
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>
</
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</
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</
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</
archimedes
>