The point of a ( x, y ) ,b (x2,y2), c ( x3,y3) are the vertics of triangle abc

The point of a ( x, y ) ,b (x2,y2), c ( x3,y3) are the vertics of tria

1.	The point of a ( x, y ) ,b (x2,y2), c ( x3,y3) are the vertics of triangle abc
Answer» I think, question is incomplete...