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Transformation Geometry Proofs : Reflections

Please see the attached file for the fully formatted problems.

Let l, m, n be distinct lines and P, Q, R be distinct points. Prove the following:
(a) sigma l sigma m = sigma m sigma l if and only if l perpendicular to m.
(b) sigma p sigma m = sigma m sigma p if and only if P E m.
plus three more questions

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Solution Summary

Proofs involving reflections are provided. The solution is detailed and well presented.

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