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Math Help - help with number of triangles

  1. #1
    Member Rimas's Avatar
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    help with number of triangles

    You have 6 stick lenghths 10,20,30,40,50 and 60cm find the number of noncongruent triangles that can be formed using three sticks as sides
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    Forum Admin topsquark's Avatar
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    Quote Originally Posted by Rimas View Post
    You have 6 stick lenghths 10,20,30,40,50 and 60cm find the number of noncongruent triangles that can be formed using three sticks as sides
    The key here is that for a triangle with sides of length a, b, and c we know that the sum of the length of any two sides is longer than the length of the third side. That is:
    a + b > c
    a + c > b
    b + c > a

    -Dan
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