Question

find the coordiantes of the third vertex where A (3,2), (B(-2,1) are the vertices of triangle abc whose centroid G has coordinates (5/3, -1/3)

Answer 1

x = x1 + x2 + x3 /3
5/3 = 3+ (-2) +x3/3
5/3 = 1+x3/3
5 = x3+1
4= x3

y = y1 + y2 + y3/3
-1/3= 2 + 1 + y3/3
-1 = 3 +y3
-4= y3

hence the co ordinates are (4,-4)