Final answer:
The triangles (7, 11, 13) and (12, 35, 37) form right triangles.
Step-by-step explanation:
In order to determine which of the given triangles form right triangles, we can apply the Pythagorean theorem. According to the theorem, in a right triangle, the sum of the squares of the lengths of the two legs is equal to the square of the length of the hypotenuse.
A right triangle can be formed from the following triangle lengths: