Question 617365
<pre>
        a rhombus (4 sides of equal length)

{{{drawing(300,400,-1.1,1.1,-1.1,1.1, line(-1,0,0,1), line(1,0,0,1),
line(-1,0,0,-1),line(1,0,0,-1),green(line(-1,0,1,0),line(0,-1,0,1)))}}}

         Edwin</pre>