Answer:
If the sum of the squares of the legs of a triangle doesn’t equal the square of the hypotenuse, the triangle is not a RIGHT triangle.
Explanation:
We know that in a right angled triangle the Pythagorean Theorem hold true.
According to Pythagorean Theorem:
If the three sides lengths of a triangle are a,b and c respectively such that:

Then such a triangle is a right triangle with hypotenuse c and other two legs of triangle as a and b.
Hence, the answer is:
The triangle is not a right triangle.