Marci of Kronland, Johannes Marcus, De proportione motus figurarum recti linearum et circuli quadratura ex motu, 1648

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        <body>
          <chap>
            <p type="main">
              <s>
                <pb xlink:href="063/01/073.jpg"/>
                <emph type="italics"/>
              af
                <emph.end type="italics"/>
              faciens cum rectâ
                <emph type="italics"/>
              ad
                <emph.end type="italics"/>
              angulum
                <emph type="italics"/>
              fad
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              grad. 30. ſemiſſem
                <lb/>
              complementi anguli reflexionis. </s>
              <s>Secet autem
                <emph type="italics"/>
              ad
                <emph.end type="italics"/>
              producta
                <lb/>
              latus trianguli
                <emph type="italics"/>
              bc
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              ad angulos rectos: dico triangulum
                <emph type="italics"/>
              abc
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                <lb/>
              in hoc ſitu à lapſu verticali reflecti ad grad-30. </s>
              <s>Ducatur enim
                <lb/>
              à centro figuræ recta
                <emph type="italics"/>
              de
                <emph.end type="italics"/>
              perpendicularis ad
                <emph type="italics"/>
              af.
                <emph.end type="italics"/>
              Et fiat ut
                <lb/>
                <emph type="italics"/>
              ae
                <emph.end type="italics"/>
              ad
                <emph type="italics"/>
              ed,
                <emph.end type="italics"/>
              ita
                <emph type="italics"/>
              dg
                <emph.end type="italics"/>
              ad
                <emph type="italics"/>
              di:
                <emph.end type="italics"/>
                <expan abbr="eritq;">eritque</expan>
                <emph type="italics"/>
              dh
                <emph.end type="italics"/>
              motus centri à reflexi­
                <lb/>
              one. </s>
              <s>Cuiex
                <emph type="italics"/>
              a
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              ducatur parallela
                <emph type="italics"/>
              ac.
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              Quia
                <expan abbr="itaq;">itaque</expan>
              angulus
                <emph type="italics"/>
              e
                <lb/>
              ad
                <emph.end type="italics"/>
              eſt grad. 30. per conſtructionem; æqualis autem angulo
                <emph type="italics"/>
              g
                <lb/>
              dh,
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              hoc eſt illi æquali
                <emph type="italics"/>
              dai:
                <emph.end type="italics"/>
              erit angulus compoſitus
                <emph type="italics"/>
              fai
                <emph.end type="italics"/>
              grad:
                <lb/>
              60, ac proinde angulus reliquus
                <emph type="italics"/>
              caz
                <emph.end type="italics"/>
              grad. 30. </s>
            </p>
            <figure id="id.063.01.073.1.jpg" xlink:href="063/01/073/1.jpg" number="29"/>
            <p type="main">
              <s>
                <emph type="center"/>
              PROBLEMA II.
                <emph.end type="center"/>
              </s>
            </p>
            <p type="main">
              <s>
                <emph type="center"/>
                <emph type="italics"/>
              Motum verticalem quadrati à plano reflectere ad angulum datum.
                <emph.end type="italics"/>
                <emph.end type="center"/>
              </s>
            </p>
            <p type="main">
              <s>Inveniendus ſit angulus reflexionis grad. 40. </s>
              <s>Ductâ
                <emph type="italics"/>
              ag
                <emph.end type="italics"/>
              li­
                <lb/>
              neâ hypomochlij, fiat angulus
                <emph type="italics"/>
              gae
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              grad: 25. ſemiſſis comple­
                <lb/>
              menti anguli reflexionis. </s>
              <s>Et ex centro figuræ producatur
                <emph type="italics"/>
              ef
                <emph.end type="italics"/>
              </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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