Valerio, Luca, De centro gravitatis solidorvm libri tres

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            <p type="main">
              <s>
                <pb xlink:href="043/01/056.jpg" pagenum="48"/>
              bifariam ſecat omnia latera parallelogrammorum inſcri­
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              ptorum baſi AC, parallela; erit in diametro BD, eorum
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              omnium parallelogrammorum centra grauitatis, atque
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              ideo totius figuræ inſcriptæ centrum grauitatis, quod ſit
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              H: & HEK, ducatur. </s>
              <s>Quoniam igitur EF, parallela
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              eſt vtrique DH, CK; erit vt CD, ad DF, ita KH, ad
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              HE, ſed minor eſt proportio CD, ad DF, quàm figu­
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              ræ ABC, ad reſi­
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              duum, dempta figu­
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              ra inſcripta; ergo &
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              KH, ad HE, minor
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              erit proportio, quàm
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              figuræ ABC, ad præ­
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              dictum reſiduum: ha­
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              beat LKH, eandem
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                <expan abbr="proportionẽ">proportionem</expan>
              ad EH,
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              quàm figura ABC,
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              ad prædictum reſi­
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              duum. </s>
              <s>Quoniam
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              igitur punctum K,
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              cadit extra figuram
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                <figure id="id.043.01.056.1.jpg" xlink:href="043/01/056/1.jpg" number="33"/>
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              ABC; multo magis punctum L; non igitur punctum L,
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              erit prædicti reſidui centrum grauitatis. </s>
              <s>Sed punctum
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              H, eſt inſcriptæ figuræ centrum grauitatis: & vt figura
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              inſcripta ad prædictum reſiduum, diuidendo, ita eſt LE,
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              ad EH; non igitur E, eſt centrum grauitatis figuræ ABC:
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              ſed ponitur E, generaliter punctum extra lineam BD;
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              Nullum igitur punctum extra lineam BD, eſt centrum
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              grauitatis figuræ ABC; in linea igitur BD, erit figu­
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              ræ ABC, centrum grauitatis. </s>
              <s>Quod demonſtrandum
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              erat. </s>
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