Verified answer

bonjour

1

vect AC (xc-xa ; yc-ya) = (-5 ; 3)

x1/4 = (-5/4 ; 3/4)

et vect BC (-2 ; -2)

x1/2 (-1 ; -1)

donc 1/4AC-1/2BC (-5/4-(-1)) ; 3/4-(-1) = (-1/4 ; 7/4)

2

xm - xc = -1/4

xm = -1/4 + (-2) = -9/4

et

ym - yc = 7/4

ym = 7/4 + 2 = 15/4