Given are the lengths of two sides of a triangle. find the range of lengths for the third side. 11,2 note: write your answer in the form 2

When we know 2 sides of a triangle,
the third side must be less than the sum of the other 2 sides and
the third side must be longer than the difference of the other 2 sides.
If the 2 sides are 2 and eleven, the third side must be greater than 9 and less than 13.

Source:
http://www.1728.org/trianinq.htm