Casati, Paolo
,
Terra machinis mota : dissertationes geometricae, mechanicae physicae hydrostaticae
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duo anguli ad baſim BD ſimul ſumpti ſunt
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æquales recto CDA vnâ cum angulo obſer
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uato A. </
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<
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ſo
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ſceles, vnuſquiſque an
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gulorum ad baſim BD
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eſt æqualis ſemirecto &
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ſemiangulo obſeruato. </
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Deme ergo ſemiangu
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lum obſeruatum gr.44.
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48. 16 1/2, ex angulo ſe
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mirecto, hoc eſt grad.
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45, remanet gr. o. m. 11.
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fec. </
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<
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>43 1/2 quantitas angu
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li ADB: Hic autem angulus ADB ſemper
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eſt ſemiſſis complementi anguli ad A obſer
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uati; angulo enim ADB facto ad punctum
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contactûs eſt æqualis angulus in ſegmento
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alterno, anguli verò ad peripheriam duplex
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eſt angulus ad centrum C. </
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que ADB noti ſunt duo anguli ad A & ad D;
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& latus BD notum eſt in partibus 682.
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13152.quarum Radius 100000.00000; ideo
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que in ijſdem Radij partibus inuenitur AB
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partium 232657. Iam fiat vt AB partium
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232657 ad Radium 100000.00000, ita AB
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ped. 480 ad aliud, & prodibit quantitas BC
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terrenæ ſemidiametri ped. 20631229, hoc
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eſt mill. 4126. paſſ. </
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<
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