Hello, asyed94!

It's much easier thank you imagine . . .

In quadrilateral

And the length of diagonal is an integer.

Find the length ofCode:A o 9 * * * * D * * o * 5 * * * 5 * * * * * * C o * * * * * * o B 17

In , the Triangle Inequality says: .

That is: .

In , the Triangle Inequality says: .

That is: .

Therefore: is an integer between 12 and 14 . . .