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This video lecture from Geometry (F.Sc. second year Mathematics) covers: Question number 31 and 32 of exercise 4.3. In question 31 we are given with the three vertices of a triangle and we have to find the area of that triangular region. In question 32 we have to find either the given three points are collinear or not by computing the area of triangle. 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.