This applet shows how to divide a line segment into 3, 4 or 5 equal parts. Use a set square to draw the parallel lines.[br]Move the point C to change the angle and the slider to change the radius of the arc.[br]More constructions are shown [url=https://sites.google.com/a/loretothegreen.ie/maths/geometry/constructions]here[/url].

The best way to learn these is to keep practising. [br][list][br][*]Use a sharp pencil.[br][*]Be neat.[br][*]Make sure the compass does not slip.[br][*]Be accurate.[br][/list]