Clavius, Christoph
,
In Sphaeram Ioannis de Sacro Bosco commentarius
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Ioan. de Sacro Boſco.
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omnibus figuris rectilineis regularibus ſibi iſoperime-
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omnium
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figurarũ re
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cti linearũ
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regulariũ
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ſibi iſoperi
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metrarum
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maximus
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eſt.</
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tris eſt.</
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circulus A B C, figura autem regularis quotcunque laterum ei iſo-
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perimetra D E F. </
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centrum circuli A B C; </
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culum A B C, figura B I K C, tot laterum, & </
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tinet figura D E F, id eſt, ſimilis figurę D E F, per ea, quæ ex Campano docui-
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mus in ſcholio 1. </
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trum G, ducatur recta A G, quæ perpendicularis erit ad I K. </
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ſus H D, ad L M, perpendicularis; </
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bifariam, ut conſtat, ſi figuris B I K C, D E F, circunſcribantur circuli. </
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cantur quoque recte G I, H L, quæ diuident angulos I, & </
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nifeſtum eſt ex demonſtratione propoſ. </
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anguli I, & </
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ipſorum dimidia, uidelicet anguli A I G, D L H, ęqualia. </
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guli I A G, L D H, ſint ęquales, vtpote recti, erunt triangula A I G, D L H,
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ęquiangula. </
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culi æqualis ponitur ambitui figuræ D E F; </
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maior ambitu figurę D E F. </
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<
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etiam latus I K, latere L M, maius, & </
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quàm L D, dimidium lateris L M. </
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ad D H; </
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obrem rectangulum contentum ſub A G, & </
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quod (per 4. </
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<
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lum contentum ſub D H, & </
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poſ. </
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regularibus ſibi iſoperimetris maior eſt, quod oſtendendum erat.</
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