# Constructing a copy of a given line segment:

To make a copy of bar"AB".

Step 1: Given bar"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 bar"AB".

Step 3: Draw any line l. Choose a point Con 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 bar"CD" is a copy of bar"AB".

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Constructing a Copy of a Given Line Segment [00:02:36]
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