Vitruvius, De architectura libri decem, 1567

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            <pb o="276" file="514.01.308" n="308" rhead="LIBER"/>
            <figure number="109">
              <caption xml:id="echoid-caption36" xml:space="preserve">Figura ex meſolabio Architæ ad inueniendas medias.</caption>
              <variables xml:id="echoid-variables69" xml:space="preserve">c t @ @ q p o n m l k l h g f p e o ξ v M @ k I o h j ε δ r B d s R q P o N M L K I H G F E L x c 6
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              N ς
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              ε ξ γ B a</variables>
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              <s xml:id="echoid-s20917" xml:space="preserve">Nunc ueniam ad Platonis inuentum, demonſtrationemq́; </s>
              <s xml:id="echoid-s20918" xml:space="preserve">& </s>
              <s xml:id="echoid-s20919" xml:space="preserve">inſtrumentum eius afferam. </s>
              <s xml:id="echoid-s20920" xml:space="preserve">Coniungantur in
                <lb/>
              b. </s>
              <s xml:id="echoid-s20921" xml:space="preserve">ad rectum angulum duæ rectæ, inter quas duæ comparabiles, ac rationeres pendentes medias uis inuenire.
                <lb/>
              </s>
              <s xml:id="echoid-s20922" xml:space="preserve">Es̃to b g. </s>
              <s xml:id="echoid-s20923" xml:space="preserve">maior e b. </s>
              <s xml:id="echoid-s20924" xml:space="preserve">minor, utraque uero extra angulum b. </s>
              <s xml:id="echoid-s20925" xml:space="preserve">producatur,maior ad d. </s>
              <s xml:id="echoid-s20926" xml:space="preserve">minor ad c. </s>
              <s xml:id="echoid-s20927" xml:space="preserve">& </s>
              <s xml:id="echoid-s20928" xml:space="preserve">
                <lb/>
              ad duos rectos angulos unum in c. </s>
              <s xml:id="echoid-s20929" xml:space="preserve">alterum in d. </s>
              <s xml:id="echoid-s20930" xml:space="preserve">in ſuis reſpondentibus lineis, es̃toq́; </s>
              <s xml:id="echoid-s20931" xml:space="preserve">angulus unus g c d. </s>
              <s xml:id="echoid-s20932" xml:space="preserve">
                <lb/>
              alter c d e. </s>
              <s xml:id="echoid-s20933" xml:space="preserve">Aio inter duas datas c b. </s>
              <s xml:id="echoid-s20934" xml:space="preserve">& </s>
              <s xml:id="echoid-s20935" xml:space="preserve">b g. </s>
              <s xml:id="echoid-s20936" xml:space="preserve">eſſe duas medias comparabiles inuentas b d.</s>
              <s xml:id="echoid-s20937" xml:space="preserve">ſcilicet,
                <lb/>
              & </s>
              <s xml:id="echoid-s20938" xml:space="preserve">b c. </s>
              <s xml:id="echoid-s20939" xml:space="preserve">quoniam poſuimus angulum e d c. </s>
              <s xml:id="echoid-s20940" xml:space="preserve">rectum, & </s>
              <s xml:id="echoid-s20941" xml:space="preserve">c d. </s>
              <s xml:id="echoid-s20942" xml:space="preserve">æque diſtantem ipſi c g. </s>
              <s xml:id="echoid-s20943" xml:space="preserve">ideo ſequitur
                <lb/>
              ex uigeſima nona primi angulum g c d. </s>
              <s xml:id="echoid-s20944" xml:space="preserve">rectum eſſe, & </s>
              <s xml:id="echoid-s20945" xml:space="preserve">æ qualem angulo c d e. </s>
              <s xml:id="echoid-s20946" xml:space="preserve">quem ſimiliter rectum
                <lb/>
                <note position="left" xlink:label="note-514.01.308-01" xlink:href="note-514.01.308-01a" xml:space="preserve">10</note>
                <note position="left" xlink:label="note-514.01.308-02" xlink:href="note-514.01.308-02a" xml:space="preserve">20</note>
                <note position="left" xlink:label="note-514.01.308-03" xlink:href="note-514.01.308-03a" xml:space="preserve">30</note>
                <note position="left" xlink:label="note-514.01.308-04" xlink:href="note-514.01.308-04a" xml:space="preserve">40</note>
                <note position="left" xlink:label="note-514.01.308-05" xlink:href="note-514.01.308-05a" xml:space="preserve">50</note>
                <note position="left" xlink:label="note-514.01.308-06" xlink:href="note-514.01.308-06a" xml:space="preserve">60</note>
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