1. Draw a line PQ of length 5.3cm.
2. From P, using a compass of some length, draw an arc on both sides of the line PQ.
3. Using the same length of compass, draw arcs from Q on both sides of the line PQ.
4. Draw a vertical line connecting the points of intersection of the arcs.
Points P and Q are symmetric with respect to the perpendicular bisector drawn.