Question 978825
x, the length of the unknown side.


According to Triangle Inequality Theorem:
{{{system(15+8>x,15+x>8,8+x>15)}}}


{{{system(x<23,x>-7,x>7)}}}, in which one statement makes poor sense;


{{{system(x<23,x>7)}}}


Combining,  {{{highlight(7<x<23)}}}


Answer is, the set of whole numbers from 8 to 22.