Archimedes
,
Archimedis De iis qvae vehvntvr in aqva libri dvo
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rectangulorum conorum ſectionibus; </
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<
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ior, cuius diameter b d; </
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<
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fg: </
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<
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<
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& </
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<
s
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punctum c ſit utriuſque terminus: </
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<
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ctione a b c quodlibet punctum b: </
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<
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<
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">iungatur h c. </
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co lineam h c ad partem ſui ipſius, quæ inter c, & </
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<
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ctionem e f c interiicitur, eam proportionẽ habere, quam
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habet a c ad c e.</
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_ b c, quæ tranſibit per f. </
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ſimiles ſunt, diametri cú baſibus æquales continent angulos. </
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<
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æquidiſtant inter ſe ſe b d, f g: </
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<
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</
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<
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<
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tando b d ad
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f g, ut a c ad
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c e: </
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ti.</
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ut earum di-
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midiæ d c ad
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c g. </
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<
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antecedēti lé
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mate ſequi-
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tur lineá b c
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per punctum
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f tranſire.
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</
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<
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terea à puncto h ad diametrum b d linea h K, æquidiſtans baſi
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a c: </
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<
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<
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