Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 2: Opera geometrica. Opera astronomica. Varia de optica
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PRÆFATIO AD LECTOREM.
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lum hinc fructum colliges.</
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<
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in ejus perimetrum duæ rectæ, appellamus planum
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ab illis rectis & </
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ſectorem.</
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rectis quotcumque ſubtendatur, ita ut triangula rectili-
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nea (quorum communis vertex eſt ſectionis centrum & </
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baſes rectæ ſubtendentes) ſint æqualia; </
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neum illud ab iſtis triangulis conflatum, polygonum re-
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gulare inſcriptum, ſi ſectio conica fuerit circulus vel el-
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lipſis; </
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neum polygonum regulare circumſcriptum.</
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rectis quotcunque tangatur & </
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trum ducantur rectæ; </
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gentibus proximis & </
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rint æqualia; </
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gonum regulare circumſcriptum, ſi ſectio conica ſit elli-
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pſis vel circulus, & </
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fuerit hyperbola.</
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lygoni regularis à ſubtendentibus comprehenſi </
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