Step-by-step explanation:
1. Draw a line segment PQ = 5 cm.
2. With any radius greater than 2.5 cm, and compass fixed at A, draw 2 arcs, one above and one below PQ
3. With the same radius, compass at Q, cut the 2 arcs drawn in step 2.
4. The line joining these two arcs is the perpendicular bisector of PQ.
i.e. RS is the perpendicular bisector of PQ
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