Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 2: Opera geometrica. Opera astronomica. Varia de optica
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ET HYPERBOLÆ QUADRATURA.
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xml:space
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eſſe ad trapezium A B I P, ut duplum trapezii A B I P ad polygonum A B D L P.</
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<
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Fig. 1. 2. 3.</
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ſimul, eſſe ad duplum trapezii A B I P, ſicut trapezium
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A B F P ad polygonum A B D L P: </
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xml:space
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<
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xml:space
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pezia A B F P, A B I P ſimul, ſunt ad trapezium A B F P,
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ut duplum trapezii A B I P ad polygonum A B D L P. </
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<
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xml:space
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quoniam trapezium A B F P, trapezium A B I P & </
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xml:space
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gulum A B P, ſunt continuè proportionalia; </
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<
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xml:space
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zium A B I P ad trapezium A B F P, ut triangulum A B P
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ad trapezium A B I P; </
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<
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xml:space
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<
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xml:space
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A B F P ſimul, ad trapezium A B F P, ita triangulum
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A B P & </
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</
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<
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pezium A B F P, ita duplum trapezii A B I P ad polygo-
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num A B D L P; </
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zium A B I P ſimul, ad trapezium A B I P, ita duplum
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trapezii A B I P ad polygonum A B D L P, quod demon-
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ſtrare oportuit.</
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ſecantes in punctis E & </
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tur polygonum A B E I O P.</
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portionale inter polygonum A B D L & trapezium A B I P.</
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Fig. 1. 2. 3.</
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pezium A I O P & </
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