Question 322151
<pre><b>
You just need to learn what the word "bisect" means. It means to
divide into two equal parts.  If you know what that means then you'll
know that a bisector must divide 36° into two equal parts, so that
will make each one of them be 18°. So if one can construct an angle of
36°, one can use the angle bisector construction to construct an angle 
of <u> 18°.</u>.

Edwin</pre>