rule:
longest side has to be less than the sum of the other 2 sides
if we assume that 23 is longest
9+?≤23
minus 9 both sides
?≤14
if we assume that 23 is not the longest
9+23≤?
32≤?
BUT
the triangle changes
and the longest side is changing because when one becomes shorter, there is a new longest
so therefor the legnth is any number from 14 to 32, not including 14 or 32
