Clavius, Christoph
,
Geometria practica
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GEOMETR. PRACT. LIB. I.
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triangulo rectangulo rectangulum ſub dif-
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ferentia baſis, & </
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angulum, & </
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æquale eſt quadrato alterius lateris circa angulum
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rectum.</
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">Nam in triangulo rectangulo A B D, cui{us} angul{us}
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D, rect{us}, ſiex B, per D, ſemicircul{us} deſcribatur E F D,
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erit A E, differentia inter baſem A B, & </
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& </
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">eiuſdem lateris B D, cum B D, B E, B F, rectæ ſint æqual{es}. </
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ſub A E, A F, æquale eſſe quadrato lateris A D. </
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laris ſit ad ſemidiam{et}rum B D, ſemicirculum tang{et} in D. </
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<
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ter.</
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gulum ſub A E, A F, quadrato tangentis A D, æquale erit,
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quod erat demonſtrandum.</
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