Question

If the cenrriod of a triangle is (2,3)find the thrd vertex of a triangle when two vertices are (5,7)&(6,8)

Answer 1

[(x1+x2+x3/3),)y1+y2+y3/3)]=(2,3)
5+6+x3/3=2
11+x3=6
X3=-5
7+8+y3/3=3
15+y3=9
Y3=-6
Third co ordinate(-5,-6)