prove that the perpendicular drawn from the point (4,1) on the join of (2,-1) and (6,5) divides it in the ratio 5:8.
let the required ratio be k : 1
Now, coordinates of point D =
Slope of line AD,
Slope of line BC,
Now,
Thus, required ratio = : 1 = 5 : 8
Hence, perpendicular drawn from the point (4, 1) on the line joining (6, 5) and (2, –1) divides it in the ratio 5 : 8 internally.