Cataneo, Girolamo, Hier. Cataneus de arte bellica, sive, de designandis ac construendis arcibus & propugnaculis, necnon & de iis oppugnandis, expugnandis ac propugnandis : de itinere exercitus, ac castrametatione, quando expediat manus cum hoste conserere, 1600

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        <div xml:id="echoid-div25" type="section" level="1" n="22">
          <head xml:id="echoid-head26" xml:space="preserve">OPERATIO OCTAVA.</head>
          <p>
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              <emph style="sc">Lineam</emph>
            rectam in aliquot partes æquales
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            diuidere.</s>
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          </p>
          <p>
            <s xml:id="echoid-s421" xml:space="preserve">Primò formabimus duos angulos æ quales, vnum in
              <lb/>
            vna extremitate dictæ lineæ, alterum verò in altera: </s>
            <s xml:id="echoid-s422" xml:space="preserve">idq́;
              <lb/>
            </s>
            <s xml:id="echoid-s423" xml:space="preserve">per primam operationem. </s>
            <s xml:id="echoid-s424" xml:space="preserve">Deinde diuidemus vnum-
              <lb/>
            quodque latus (quorum ope angulos formauimus)
              <lb/>
            in tot partes in quot volumus diuidere lineam datam,
              <lb/>
            vnica excepta: </s>
            <s xml:id="echoid-s425" xml:space="preserve">& </s>
            <s xml:id="echoid-s426" xml:space="preserve">adhibita regula ducemus lineas, quæ
              <lb/>
            interſecent lineam datam, ſicq́; </s>
            <s xml:id="echoid-s427" xml:space="preserve">linea data apparebit
              <lb/>
            diuiſa in tot partes in quot erat à nobis diuidenda.</s>
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          <p>
            <s xml:id="echoid-s429" xml:space="preserve">Exempli gratia, ſtatuamus lineam
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            , diuidendam
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              <emph style="sc">A -- B</emph>
            ,
              <lb/>
            eſſe in partes octo: </s>
            <s xml:id="echoid-s430" xml:space="preserve">formabimus duos angulos, vnum
              <lb/>
            in puncto
              <emph style="sc">A</emph>
            , qui erit angulus
              <emph style="sc">DAB</emph>
            , alterum verò in
              <lb/>
            puncto
              <emph style="sc">B</emph>
            , qui erit angulus
              <emph style="sc">CBA</emph>
            , vt in figura apparet.</s>
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            <image file="0023-01" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/archimedes_repository/large/catan_belli_502_la_1600/figures/0023-01"/>
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