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Sagot :

VINS

bonsoir

je fais le 15

(AB)² = ( 2 + 2 )² + ( - 1 - 1 )² = 4 ² + ( - 2 )² = 16 + 4 = 20

(BC)² = ( 1 - 2 )² + ( - 3 + 1 )² = ( - 1 )² + ( - 2 )² = 1 + 4 = 5

(AC)² = ( 1 + 2 )² + ( - 3 - 1 )² = 3² + ( - 4 )² = 9 + 16 = 25

le triangle semble rectangle

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