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There are 5 such triangles possible. (A)
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you need to give an explanation. it is not appropriate to give just the final figure.

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Let the sides of the triangle be a, b, and c respectively.
     a = 3 cm          b = 8 cm

      | a - b | <  c <  | a + b |
       5 cm  < c < 11 cm

       c = 6, 7, 8, 9, and 10 cm.

  Hence there are 5 triangles possible.  as c can only be of length = integer.

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