Since the triangle in question is a right triangle, given the leg lengths, you can use the Pythagorean Theorem to find the length of the hypotenuse.
The Pythagorean Theorem: a² + b² = c², where c is the hypotenuse of the triangle.
Plug in the given leg lengths and solve for c.
a² + b² = c²
8.4² + 7.6² = c²
70.56 + 57.76 = c²
128.32 = c²
11.33 ≈ c
Answer:
11.33 cm