Page 2 - LN

Step 1: Given AB whose length is not known.

Step 2: Fix the compasses pointer on A and the pencil end on B. The opening of the instrument
now gives the length of AB.

Step 3: Draw any line l. Choose a point C on l. Without changing the compasses setting, place
the pointer on C.

Step 4: Swing an arc that cuts l at a point, say, D. Now CD is a copy of AB.