Given two lines, state and prove the precise conditions under which reflecting a point about the...

Given two lines, state and prove the precise conditions under which reflecting a point about the two lines is commutative.

I have seen this proved on here more than once, but I do not understand the answers that have been provided. I have seen that the two lines must be perpendicular- Why isn't it all sets of two lines? Is there a counterexample that I can visualize? Is that answer even correct? Thank you!

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milcah answered 2 years ago

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