bonsoir
EF = ( 9 - 1 )² + ( 1 + 3)² = 8² + 4 ² = 64 + 16 = 80
FG = ( 13 - 9)² + ( - 7 - 1 )²= 4 ² + ( - 8)² = 16 + 64 = 80
HG = ( 13 - 5 )² + ( - 7 + 11 )² = 8 ² + 4 ² = 80
EH = ( 5 - 1 )² + ( - 11 + 3 )² = 4 ² + ( - 8)² = 80
la figure est un carré
aire = 80 ²
