Commandino, Federico, Liber de centro gravitatis solidorum, 1565

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      <text>
        <body>
          <chap>
            <p type="main">
              <s id="s.000565">
                <pb xlink:href="023/01/062.jpg"/>
              compoſitam proportionem habet ex proportione
                <expan abbr="baſiũ">baſium</expan>
              ,
                <lb/>
              & proportione altitudinum. </s>
              <s id="s.000566">Quare & pyramis, cuius ba­
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              ſis eſt quadrilaterum abcd, & altitudo ef ad pyramidem,
                <lb/>
                <figure id="id.023.01.062.1.jpg" xlink:href="023/01/062/1.jpg" number="56"/>
                <lb/>
              cuius baſis quadrilaterum ghKl, & altitudo mn, compoſi
                <lb/>
              tam habet proportionem ex proportione baſium abcd,
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              ghkl, & ex proportione altitudinum ef, mn. </s>
              <s id="s.000567">quod qui­
                <lb/>
              dem demonſtraſſe oportebat.</s>
            </p>
            <p type="margin">
              <s id="s.000568">
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              20. huius</s>
            </p>
            <p type="main">
              <s id="s.000569">Ex iam demonſtratis perſpicuum eſt, priſma
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              ta omnia, & pyramides, in quibus axes cum baſi­
                <lb/>
              bus æquales angulos continent, proportionem
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              habere compoſitam ex baſium proportione, &
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              proportione axium. </s>
              <s id="s.000570">demonſtratum eſt enim, a­
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              xes inter ſe eandem proportionem habere, quam
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              ipſæ altitudines.</s>
            </p>
            <p type="head">
              <s id="s.000571">THEOREMA XVIII. PROPOSITIO XXII.</s>
            </p>
            <p type="main">
              <s id="s.000572">CVIVSLIBEt pyramidis, & cuiuslibet coni, </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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