# Congruence Among Line Segments:

• The method of superposition examines the congruence among line segments.

• Copy bar"CD"  "and place it on " bar"AB".
You find that bar"CD" "covers"  bar"AB", with C on A and D on B.
Hence, the line segments are congruent. We write bar"AB" ≅ bar"CD".

• If two line segments have the same (i.e., equal) length, they are congruent. Also, if two line segments are congruent, they have the same length.

• Copy bar"RS"  "and place it on"  bar"PQ".
bar"RS" and bar"PQ" are not congruent.

• It is because the line segments do not coincide when placed one over another.

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What is Congruence among Line Segments? [00:04:03]
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