Simple Triangle/rectangle problem

  1. hi people,

    got a simple question here..
    assuming it is simple it seems so... but has been a long time since geometry, so looking for help :)

    assuming only the length of a diagonal of a rectangle is known (say 20"), is it possible to find the length & breadth..?

    stating to be a rectangle, as there is no clarity if this is a square or not...

    any help will be appreciated!
  2. jcsd
  3. mathwonk

    mathwonk 9,957
    Science Advisor
    Homework Helper

    does the diagonal length of a piece of paper determine the exact size of the paper?

    are two right triangles congruent if they have the same diagonal? I.e. does one side and one angle determine a triangle?

    do you know pythagoras theorem?
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