# Geo3.19

From Example Problems

Find the equation of the lines which pass through the point of intersection of the pair of lines and are at right angles to them.

From the given

Point of intersection is

Now the equation to the pair of lines parallel tot he given line passing thro'the origin is

Equation to the lines perpendicular to the above line is

Equation to the pair of lines thro' and perpendicular to the above equation is

which is the required perpendicular pair of lines.