bonjour
[AB]² = ( 0 - 4 ) ² + ( 4 - 1 )² = ( - 4 )² + 3 ² = 16 + 9 = 25
[BC]² = ( - 6 - 0 )² + ( - 4 - 4 )² = ( - 6 )² + ( - 8 )²= 36 + 64 = 100
[AC]² = ( - 6 - 4 )² + ( - 4 - 1 )² = ( - 10 )² + ( - 5 )² = 100 + 25 = 125
100 + 25 = 125 donc il est rectangle
termine