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Math Help - Help with proof: If two rigid motions agree on two distinct points...

  1. #1
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    Help with proof: If two rigid motions agree on two distinct points...

    Hey there everyone. First time user of MHF. I'm having significant difficulty with proofs.



    If two rigid motions agree on two distinct points, then the agree everywhere on the straight line joining those two points.

    How would I even begin to prove this?
    Last edited by mathness; February 9th 2013 at 07:28 PM.
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  2. #2
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    Re: Help with proof: If two rigid motions agree on two distinct points...

    If you want a mathematical proof, start with the mathematical definition of "rigid motions".
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