Respuesta :

sqdancefan

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Answer:

  x ≈ 17.3

Step-by-step explanation:

The triangles are all similar, so the side lengths are proportional.

  short side / hypotenuse = x/30 = 10/x

  x² = 300 . . . . . . cross multiply

  x = 10√3 . . . . . . take square root

  x  ≈ 17.3