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           style="stroke-width:0.26458332px"
           y="150.71013"
           x="141.78871"
           id="tspan7780-0-0"
           sodipodi:role="line">Sd2</tspan></text>
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         y="146.44121"
         x="91.456802"
         style="font-style:normal;font-weight:normal;font-size:5.64444447px;line-height:125%;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
         xml:space="preserve"><tspan
           style="stroke-width:0.26458332px"
           y="146.44121"
           x="91.456802"
           id="tspan7780-0-0-8"
           sodipodi:role="line">Sd1</tspan></text>
      <text
         id="text7782-2-9-8-5"
         y="99.127487"
         x="85.207565"
         style="font-style:normal;font-weight:normal;font-size:5.64444447px;line-height:125%;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
         xml:space="preserve"><tspan
           style="stroke-width:0.26458332px"
           y="99.127487"
           x="85.207565"
           id="tspan7780-0-0-8-9"
           sodipodi:role="line">Su</tspan></text>
      <text
         id="text7782-2-9-8-5-8"
         y="175.96782"
         x="61.906757"
         style="font-style:normal;font-weight:normal;font-size:5.64444447px;line-height:125%;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
         xml:space="preserve"><tspan
           style="stroke-width:0.26458332px"
           y="175.96782"
           x="61.906757"
           id="tspan7780-0-0-8-9-7"
           sodipodi:role="line">Sc1</tspan></text>
      <text
         id="text7782-2-9-8-0"
         y="122.47377"
         x="104.2201"
         style="font-style:normal;font-weight:normal;font-size:5.64444447px;line-height:125%;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
         xml:space="preserve"><tspan
           style="stroke-width:0.26458332px"
           y="122.47377"
           x="104.2201"
           id="tspan7780-0-0-8-3"
           sodipodi:role="line">10°</tspan></text>
      <text
         id="text7782-2-9-8-5-8-6"
         y="190.386"
         x="83.477783"
         style="font-style:normal;font-weight:normal;font-size:5.64444447px;line-height:125%;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
         xml:space="preserve"><tspan
           style="stroke-width:0.26458332px"
           y="190.386"
           x="83.477783"
           id="tspan7780-0-0-8-9-7-4"
           sodipodi:role="line">Sc2</tspan></text>
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    <text
       xml:space="preserve"
       style="font-style:normal;font-weight:normal;font-size:5.64444447px;line-height:125%;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
       x="13.395929"
       y="191.14729"
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         id="tspan8138"
         x="13.395929"
         y="191.14729"
         style="stroke-width:0.26458332px">d = R*sinθ*tan10°</tspan><tspan
         sodipodi:role="line"
         x="13.395929"
         y="198.20285"
         style="stroke-width:0.26458332px"
         id="tspan8142">L = R*cosθ-d = R*(cosθ-sinθ*tan10°)</tspan><tspan
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         x="13.395929"
         y="205.25841"
         style="stroke-width:0.26458332px"
         id="tspan8144">(Su+Sd1+Sd2) = (R*R-r*r)*(π/6)</tspan><tspan
         sodipodi:role="line"
         x="13.395929"
         y="212.31396"
         style="stroke-width:0.26458332px"
         id="tspan8184">(Su+Sd1+Sc1) = R*R*θ/2</tspan><tspan
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         x="13.395929"
         y="219.36951"
         style="stroke-width:0.26458332px"
         id="tspan8146">(Sc1+Sc2) = π*r*r/6</tspan><tspan
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         x="13.395929"
         y="226.42506"
         style="stroke-width:0.26458332px"
         id="tspan8148">(Sd2+Sc2) = (1/2)*R*R*(π/3-θ)</tspan><tspan
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         x="13.395929"
         y="233.48062"
         style="stroke-width:0.26458332px"
         id="tspan8152">(Sd1+Sc1) = (L/2)*R*sinθ </tspan><tspan
         sodipodi:role="line"
         x="13.395929"
         y="240.53618"
         style="stroke-width:0.26458332px"
         id="tspan8176">    = (1/2)*R*R*(sinθ*cosθ-sinθ*sinθ*tan10°)</tspan><tspan
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         x="13.395929"
         y="247.59174"
         style="stroke-width:0.26458332px"
         id="tspan8156">(Sd1+Sd2) = (Sd2+Sc2)+(Sd1+Sc1)-(Sc1+Sc2) </tspan><tspan
         sodipodi:role="line"
         x="13.395929"
         y="254.64729"
         style="stroke-width:0.26458332px"
         id="tspan8180">    = (1/2)*R*R*(π/3-θ+sinθ*cosθ-sinθ*sinθ*tan10°)-(π/6)*r*r</tspan><tspan
         sodipodi:role="line"
         x="13.395929"
         y="261.70285"
         style="stroke-width:0.26458332px"
         id="tspan8160" /><tspan
         sodipodi:role="line"
         x="13.395929"
         y="268.75839"
         style="stroke-width:0.26458332px"
         id="tspan8162">Equation on θ:</tspan><tspan
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         x="13.395929"
         y="275.81396"
         style="stroke-width:0.26458332px"
         id="tspan8164">(Su+Sd1+Sd2) = 2*(Sd1+Sd2)</tspan><tspan
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         x="13.395929"
         y="282.86951"
         style="stroke-width:0.26458332px"
         id="tspan8166">(R*R-r*r)*(π/6) = R*R*(π/3-θ+sinθ*cosθ-sinθ*sinθ*tan10°)-(π/3)*r*r</tspan><tspan
         sodipodi:role="line"
         x="13.395929"
         y="289.92508"
         style="stroke-width:0.26458332px"
         id="tspan8168">(1-r*r/(R*R))*(π/6) = θ-sinθ*cosθ+sinθ*sinθ*tan10°</tspan><tspan
         sodipodi:role="line"
         x="13.395929"
         y="296.98062"
         style="stroke-width:0.26458332px"
         id="tspan8170" /><tspan
         sodipodi:role="line"
         x="13.395929"
         y="304.03619"
         style="stroke-width:0.26458332px"
         id="tspan8172" /></text>
    <text
       xml:space="preserve"
       style="font-style:normal;font-weight:normal;font-size:5.64444447px;line-height:125%;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
       x="6.3615098"
       y="11.066898"
       id="text4854"><tspan
         sodipodi:role="line"
         x="6.3615098"
         y="11.066898"
         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:6.3499999px;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;writing-mode:lr-tb;text-anchor:start;stroke-width:0.26458332px"
         id="tspan4864">Derivation of the equation to equalize areas of the right upper </tspan><tspan
         sodipodi:role="line"
         x="6.3615098"
         y="18.305735"
         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:6.3499999px;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;writing-mode:lr-tb;text-anchor:start;stroke-width:0.26458332px"
         id="tspan4870">region and the right lower region of a Tri-Bahtinov mask</tspan></text>
  </g>
</svg>