The measure of two sides of a triangle are 7 and 11. Determine the range of values for the third side of the triangle

_ < n < _

In a triangle, the third side must be greater than the difference of the other two sides and less than the sum of the other two sides.

So, the range of values for the third side (n) is:

11 - 7 < n < 11 + 7
4 < n < 18

and with 5.2 and 8.1 instead?

In this case, the range of values for the third side (n) would be:

8.1 - 5.2 < n < 8.1 + 5.2
2.9 < n < 13.3