This video lecture from Geometry (F.Sc. second year Mathematics) covers: Question number 6 and 7 of exercise 4.1. Question 6 is about finding the unknown x-coordinate of the vertex of a right triangle and Question 7 is about finding the unknown y-coordinate of a point where three collinear points are given. 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.