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Sagot :

Bonjour


on utilise le théorème de pythagore :


la partie cassée = 6 - x


x^2 + 1,5^2 = (6 - x)^2

x^2 + 2,25 = 36 - 12x + x^2

x^2 - x^2 + 12x = 36 - 2,25

12x = 33,75

x = 33,75/12

x = 2,8125 m

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