Answer:
The center is [-1,-2
Step-by-step explanation:
A(13, -2), B(-1,-2),C (6,-9)
If G is the centre so G(x,y) with x= (13-1+6)/3, y= (-2-2-9)/3
x= 6, y= -13/3= -4.3
G (-6, -4.3 )
