Question

Find the length of side xx to the nearest tenth.
45°
45°
x
11

Answer 1

I need to know which side is the 11 (a leg or the hypotenuse). For a 45°–45°–90° triangle:

- If 11 is the hypotenuse: each leg x = 11/√2 = 11√2/2 ≈ 7.8.
- If 11 is a leg: the hypotenuse x = 11·√2 ≈ 15.6.

Which side is 11 in your diagram?