This video lecture from Vectors (F.Sc.second year Mathematics) covers: Question 4-7 of exercise 7.4. In these questions we find area of parallelogram whose vertices are given. We also determine the vectors which are parallel and perpendicular to each other by using vector method. 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.