SOLUTION: please help me! i dont know how to do this... find coordinates of for the centroid whose triangle verticies are (a,p) (b,q) and (c,r). then find the centroid for (-1,5) (-2,8) a

Algebra ->  Length-and-distance -> SOLUTION: please help me! i dont know how to do this... find coordinates of for the centroid whose triangle verticies are (a,p) (b,q) and (c,r). then find the centroid for (-1,5) (-2,8) a      Log On


   



Question 149652: please help me! i dont know how to do this...
find coordinates of for the centroid whose triangle verticies are (a,p) (b,q) and (c,r). then find the centroid for (-1,5) (-2,8) and (3,3)

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
The centroid of a triangle with vertices at (x%5Ba%5D,y%5Ba%5D),(x%5Bb%5D,y%5Bb%5D),(x%5Bc%5D,y%5Bc%5D) is equal to
(X,Y)=%281%2F3%29(x%5Ba%5D%2Bx%5Bb%5D%2Bx%5Bc%5D,y%5Ba%5D%2By%5Bb%5D%2By%5Bc%5D)
In the first case,
(X,Y)=%281%2F3%29(a%2Bb%2Bc,p%2Bq%2Br)
In the second case,
(X,Y)=%281%2F3%29(-1-2%2B3,5%2B8%2B3)
(X,Y)=%281%2F3%29(0,16)
(X,Y)=(0,16%2F3)