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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Complete the following statements:
Among two congruent angles, one has a measure of 70°; the measure of the other angle is __________.