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Sagot :

Bonjour,

pythagore:

RE² = 6² +10,5²

= 36+110,25

RE² = 146,25

NE² = RE²+NR²

NE² - RE² = NR²

13,5² -146,25

= 1822,25 - 146,25 = 36

NR = √36 => 6 cm

NR = E1

RE en commun

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