help/mark.html

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  <h2>Equal Mark <a name="equalmark" id="equalmark"></a></h2>
  <br />
  <p>Construct the mark which is used to indicates the ratio of the length of two segments. </p>
  <p><img src="images2/equal mark.gif" width="200" height="150" border="1" /></p>
  <p>For example, in the above diagram, D is the midpoint of AB, E is the midpoint of AC. We know that DE is half of BC. We can use Equal Mark to show their relationship. </p>
  <h2>Right Anlge Mark <a name="rmark" id="rmark"></a></h2>
  <br />
  <p>If two line is perpendicular, we can use this action to indicate that.</p>
  <p><img src="images2/right angle mark.gif" width="200" height="150" border="1" /> </p>
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<p class="editdate">JGEX Help </p>
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