Clavius, Christoph, Geometria practica
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          <figure number="117">
            <image file="187-01" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/187-01"/>
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        <div xml:id="echoid-div413" type="section" level="1" n="169">
          <head xml:id="echoid-head172" xml:space="preserve">GEOMETRIÆ
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          PRACTICÆ
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          LIBER QVARTVS.</head>
          <figure number="118">
            <image file="187-02" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/187-02"/>
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        <div xml:id="echoid-div414" type="section" level="1" n="170">
          <head xml:id="echoid-head173" xml:space="preserve">AREAS</head>
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            <s xml:id="echoid-s6098" xml:space="preserve">Superficierum planarum inueſtigans.</s>
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            <s xml:id="echoid-s6100" xml:space="preserve">QVEMADMODVM linea recta rect{as} line{as} meti-
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              <note position="right" xlink:label="note-187-01" xlink:href="note-187-01a" xml:space="preserve">Pen{es} quid
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              menſuræ li-
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              nearum re-
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              ctarum, pla-
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              narum ſuper-
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              ficierum &
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              ſolidorum ſu-
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              mantur.</note>
            tur, ita Geometræ ſuperficies plan{as} per ſuperficiem qua-
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            dratam, & </s>
            <s xml:id="echoid-s6101" xml:space="preserve">corpora, ſiue ſolida, per corp{us} cubicum me-
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            tiri ſolent. </s>
            <s xml:id="echoid-s6102" xml:space="preserve">Nam ſicut linea recta dicitur 100. </s>
            <s xml:id="echoid-s6103" xml:space="preserve">palmorum
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            in qua linea vni{us} palmi centies continetur, ita ſuperfi-
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            cies plana dicitur 100. </s>
            <s xml:id="echoid-s6104" xml:space="preserve">palmorum, quæ centies quadra-
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            tum continet, cui{us} lat{us} palmo æquale est: </s>
            <s xml:id="echoid-s6105" xml:space="preserve">& </s>
            <s xml:id="echoid-s6106" xml:space="preserve">ſolidum
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            100. </s>
            <s xml:id="echoid-s6107" xml:space="preserve">palmorum illud dicitur, quod complectitur 100. </s>
            <s xml:id="echoid-s6108" xml:space="preserve">cubos, quorum quilibet la-
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            t{us} habet vni{us} palmi: </s>
            <s xml:id="echoid-s6109" xml:space="preserve">quod de aliis etiam menſuris, vt de pede, cubito, paſſu,
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            milliario, &</s>
            <s xml:id="echoid-s6110" xml:space="preserve">c. </s>
            <s xml:id="echoid-s6111" xml:space="preserve">intelligendum est. </s>
            <s xml:id="echoid-s6112" xml:space="preserve">Quia vero quælibet ſuperficies tot quadrata
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            cuiuſque menſuræ comprehendere dicitur, quot in parallelogrammo rectangulo,
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            quod illi æquale est, continentur, explicandum primo loco erit, quaratione area
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            cuiuſlibet rectanguli cognoſcatur. </s>
            <s xml:id="echoid-s6113" xml:space="preserve">Deinde de area triangulorum, quadrilatero-
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            rum non rectangulorum, cæterarumque figurarum plurium laterum @gem{us}:
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            </s>
            <s xml:id="echoid-s6114" xml:space="preserve">ac denique circulum, eiuſque partes metiemur.</s>
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        <div xml:id="echoid-div416" type="section" level="1" n="171">
          <head xml:id="echoid-head174" xml:space="preserve">DE AREA RECTANGVLORVM
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            <emph style="sc">Capvt</emph>
          I.</head>
          <note position="right" xml:space="preserve">Area qua-
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          drati, & alte-
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          ra parte lon-
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          gioris quo pa-
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          cto cognoſca-
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          tur.</note>
          <p>
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              <emph style="sc">QVoniam</emph>
            Euclides defin. </s>
            <s xml:id="echoid-s6117" xml:space="preserve">1. </s>
            <s xml:id="echoid-s6118" xml:space="preserve">lib. </s>
            <s xml:id="echoid-s6119" xml:space="preserve">2. </s>
            <s xml:id="echoid-s6120" xml:space="preserve">docet, omne parallelogram-
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            mum rectangulum contineri ſub rectis duabus lineis, quæ rectum
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            comprehendunt angulum; </s>
            <s xml:id="echoid-s6121" xml:space="preserve">manifeſtum eſt, aream cuiuſque re-
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            ctanguli produci ex multip licatione duorum laterum circa </s>
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