Vitruvius
,
De architectura libri decem
,
1567
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LIBER
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portione inter ſe comparatæ, ſicut ſe habet prima ad quartam, ita ſolidum quod fit a prima ſimile eſt illi, quæ
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fit a ſecunda, & </
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<
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">igitur ratio ſolidi a, ad ſimile ſolidum b, est, ut d, ad c, exſubie=
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ctione autem d, ad e, comparatur ut b, ad o, Propoſito igitur ſolido a, ſub data ratione ipſius b, ad c,
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conſtructum eſt ſimile ſolidum b, quod facere mens fuerat. </
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<
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">Amplius ſi cubum ſolido quadrangulari &</
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fig-514.01.312-01
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fig-514.01.312-01a
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119
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<
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xml:space
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">Demostratio ter tiæ proprietatis, & aſſumptionis Nicomedis.
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instrumentum Nicomedis.</
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<
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fig-514.01.312-02
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fig-514.01.312-02a
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number
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120
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<
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xml:space
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b c d f g</
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fig-514.01.312-03
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fig-514.01.312-03a
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number
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121
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prrima proprie
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tatis.</
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fig-514.01.312-04
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fig-514.01.312-04a
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122
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123
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124
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quale conficere uelimus, hoc modo agendum eſt. </
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a b, altitudo b c, longitudo c d, oportet cubum æqualem illi conſtituere. </
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latus quadratum plani a b c, ideſt linez recta, cuius quadratum æquum ſit plano a b c, quæ linea ſit e,
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& </
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