Which right triangle has a hypotenuse of exactly 58 mm?
There are infinitely many right triangles that could have a hypotenuse of 58 mm, as long as the lengths of the other two sides satisfy the Pythagorean theorem. Here is one possible example:
In a right triangle with sides 40 mm and 42 mm, the hypotenuse can be calculated using the Pythagorean theorem:
c^2 = a^2 + b^2
c^2 = 40^2 + 42^2
c^2 = 1600 + 1764
c^2 = 3364
c = √3364
c ≈ 58 mm