Respuesta :

seetha1980

Answer:

x = 80

Step-by-step explanation:

By Pythagoras theorem,

89^2 = x^2 + 39^2

x^2 = 89^2 - 39^2

x^2 = 7921 - 1521

x^2 = 6400

x = √6400

x = 80

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