Answer:
The answer is "triangle ABC is not a right triangle".
Step-by-step explanation:
For a right-angle triangle:
Its square upon on longest or triangular edges is equivalent to the total of the other two squares
Its parameters indicated throughout the question are;
Square of lateral length 
The square of lateral length 
The square of lateral length 
Thus, the longest side is C, as well as the size
of the squares of its two sides, is
, lower than square
, hence, the ABC triangle is not correct. Its longest edge is consequently C.