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Geometry(whats the result?)

  1. Oct 1, 2007 #1
    hi,evryone!
    whats the result of connecting the middle of every sides of each common tetrahedron?
    (please give proofs,actualy the proof is much more important than the answer)
    1.squer:
    2.rhornbus:
    3.parallelogram:
    .
    .
    .
    (im sorry if theres in mistake in my writing)
    thanks!
     
  2. jcsd
  3. Oct 1, 2007 #2
    Interior tetrahedron

    I think it is other interior tetrahedron.
    See deawing.
     

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  4. Oct 1, 2007 #3

    cristo

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    You need to make an effort before someone will help you. Also, it will ensure you get help quicker if you state the exact question, as worded on your exercise sheet.
     
  5. Oct 1, 2007 #4

    HallsofIvy

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    Even more important than the proof is YOU working on this yourself. What have YOU done?
     
  6. Oct 1, 2007 #5
    I know the answer but not the proof

    you r all right,friends!
    but i dont know how to start i have drawn the shapes and i already know the answer i am thinking about the proof.
    thanks everyone!
     

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  7. Nov 3, 2007 #6

    Hurkyl

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    Er, did you mean quadrilateral?
     
  8. Nov 3, 2007 #7
    No

    No , its just an example!
    (i found the answer)
     
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