what is the shortest way to find the mirror image of a line with respect to another line?

Hi Sarthak,

This would be the shortest way:

Find the point of intersection, say A, of the two lines. Then take a point on the line, whose reflection you need to get (say that point is B). Now find the reflection of B in the other line. Say that point is B"

Now find the equation of the line joining A and B" and that would be the equation of the reflected line.

Hope that helps.

All the best.

Regards,

Ashwin (IIT Madras).