1. For triangle ABC, find equation of median AD if co-ordinates of A, B and C are (-1,-3), (5,-4) and (3,2) respectively?
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By: anil on 05 May 2019 02.12 am
Coordinates of the triangle A (-1,-3) , B (5,-4) and C (3,2) D is the mid point of BC, => Coordinates of point D = $$(frac{(5 + 3)}{2} , frac{(-4 + 2)}{2})$$ => D = (4 , -1) Now, equation of line AD = $$(y + 3) = frac{(-1 + 3)}{(4 + 1)} (x + 1)$$ => $$(y + 3) = frac{2}{5} (x + 1)$$ => $$5y + 15 = 2x + 2$$ => $$2x - 5y = 13$$
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