Question

. Construct the line that is perpendicular to the given line through the given point.

Answer 1

suppose the slope of PQ line is m1...then the slope of a perpendicular line to it will be m2=-1/m1
let R(x1,y1) be the point then equation of the line passing through it,perpenicular to PQ is:
y-y1=m2(x-x1)
y-y1=(-1/m1)(x-x1)
y=(-1/m1)(x-x1)+y1