This video lecture from Geometry (F.Sc.second year Mathematics) covers: Question number 23 of exercise 4.3. In this question we find the distance between two parallel lines and we also sketch these lines. We also find the equation of the third line lying midway between the two parallel lines. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.