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      <title>Measure Length</title>
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      <div class="title_topic2" id="xps10_pagetitle">Measure Length</div>
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               <p class="para_td">Overview</p>
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               <p class="para_td"><a class="links" href="javascript:void(0)" onclick="top.openFile('nx_analysis/ana_arclength_ht.html');return(false);">How To</a></p>
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               <p class="para_td"> <a class="links" href="javascript:void(0)" onclick="top.openFile('nx_analysis/ana_arclength_op.html');return(false);">Options</a></p>
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      </table><br><p class="para_topic">Arc Length measures the arc length of a curve or line.  Use selection intent and section building to measure the length of a set of curves between intersection points.</p>
      <p class="para_topic">The <b class="uiTerm">Measure Length</b> option finds the arc length of any collection of curves, planar or non-planar, using the following formula:
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      <p class="para_topic">where</p>
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               <p class="para_td">S</p>
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               <p class="para_td">=</p>
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               <p class="para_td">Length of curve</p>
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               <p class="para_td">ds</p>
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               <p class="para_td">=</p>
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               <p class="para_td">Incremental length</p>
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               <p class="para_td">f(t)</p>
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               <p class="para_td">=</p>
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               <p class="para_td">Definition of curve with respect to parameter</p>
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               <p class="para_td">dt</p>
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               <p class="para_td">=</p>
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               <p class="para_td">Incremental parameter</p>
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               <p class="para_td">t1,t2</p>
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               <p class="para_td">=</p>
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               <p class="para_td">Start and end parameters</p>
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