Respuesta :

shymaeida5

Answer:

 c^2 = a^2 +b^2

 c^2 = (20 ft)^2 +(21 ft)^2 = 442 ft^2

 c = √(442 ft^2) = 21,02 ft

 

The length of the missing side is 21,02 ft.

Step-by-step explanation:

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