Hi

Note: 45-45-90 rtΔ  , the ratio between legs and the hypotenuse is 1:1:

legs are equal:  the other leg is 3.7m

Hypotenuse = 



CHECKING our Answer

 (3.7)^2 + (3.7)^2 = c^2

  2(3.7)^2 = c^2

 = c   |tossing out negative solution for length 

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