This video lecture from Geometry (F.Sc.second year Mathematics) covers: Question number 8 and 9 of exercise 4.3. In question 8 we are given with two pairs of points, and we have to find either these lines (determined by each pair of points) are parallel or perpendicular to each other or none. In question 9 we find the equation of a line by using the given information. 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.