Clavius, Christoph
,
Geometria practica
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GEOMETR. PRACT.
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in triangulo inclinato, & </
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prædicti, & </
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mæ baſis exiſtere: </
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<
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">ac ꝓinde perpendicularem p q, ad planũ baſis per m n, du-
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ctũ demiſſam, æqualẽ eſſe altitudini Icoſaedri, eiuſq; </
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nius pyramidis trigoni eſſe æqualem. </
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<
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atur materiale aliquod Icoſaedrum. </
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<
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midis, cognoſcenda eadem ſumma diligentia e@it, beneficio inſtrumentiparti-
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um, in partibus lateris corporis regularis propoſiti.</
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">DE AREA SPHÆRÆ, INVENTIONE-
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que ſuperficiei conuexæ eiuſdem ſphæræ.</
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V.</
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ſtranda prius erunt nonnulla ad eamrem valdè neceſſaria, atq; </
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tudinis cuiuſcunque, eandem habent duæ ſimiles partes alterius cu-
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iuſuis magnitudinis.</
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enim A, eadem pars magnitudinis B, quæ C, magnitudinis D: </
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eadẽ pars magnitudinis B, quæ F, ma-
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g@itudinis D. </
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C, ad F, Quoniam enim eſt, vt A, ad B,
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ita C, ad D, quod vtrobiq@ eadem pro-
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portio ſubmultiplex poſita ſit. </
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