<![CDATA[Math Is Fun Forum / Straightedge and compass constructions]]>2006-10-21T03:51:56ZFluxBBhttp://www.mathisfunforum.com/viewtopic.php?id=4777<![CDATA[Re: Straightedge and compass constructions]]>If you want to duplicate the length of a line segment, you just need a compass.

If you also want the same direction, construct a parallel line first.

]]>http://www.mathisfunforum.com/profile.php?id=31922006-10-21T03:51:56Zhttp://www.mathisfunforum.com/viewtopic.php?pid=46929#p46929<![CDATA[Straightedge and compass constructions]]>Suppose you are solving a ruler and a straigtedge construction. Do you have to assume the compass is collaspible eventhough Euler proved it is possible to copy a line segment with a collaspible. Do I have to copy a line segment using Euler's method or could I just lift the compass and move it to another place and draw the segment?]]>http://www.mathisfunforum.com/profile.php?id=12932006-10-20T23:23:59Zhttp://www.mathisfunforum.com/viewtopic.php?pid=46914#p46914