User: desconectar
Maths Exercices
Distance between two lines

If the two lines intersect, then it is clear that D = 0
If they do not intersect and are parallel, then D corresponds to the distance between a point from one of the two lines and the other line and is given by the formula that find the distance from a point to a line.

Find the distance between the lines r: 3x-4y+1=0 and s: 3x-4y-9=0

D =