stretch the compass by a considerable amount (just not too short, or it's hard to draw) and put the point on W. Draw an arc, with the point still on W. Do the same to X (placing the compass point on X and and drawing an arc), but the length of how stretched the compass is must me the SAME. If you did it right, you would have two arcs where a point meets between them. Using a ruler, draw a line from the dot down to the line WX. Then you should see the line's perpendicular bisector( perpendicular bisector is a line running down a certain line so the angles make a 90 degree )!
