Define rotations, reflections, and translations using geometric language: angles, circles, perpendicular/parallel lines, and segments.
Replace casual transformation language with precise geometric language
Problem
Rewrite “Flip the figure over line \(m\)” using precise transformation language.
Big Picture
What this problem is really about
Casual motion words describe an impression, while precise geometry names a transformation and the datum that makes its action unique. Interpret “flip” through the point-image relationship of a mirror, retain the named line that controls that relationship, and rewrite the instruction without adding or losing information.
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