Answer to Question #5167 in Analytic Geometry for pong javeng
Determine in two ways whether or not the points A (-1,-1), B(4,1) and C(12, 4) lie on a straight line. Is AB + BC = AC? Is area ABC zero ?
If they lie on line then
4=12*2/5-3/5=21/5, is not a line, so AB + BC is not equal to& AC
area ABC is for sure more then 0