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Find the coordinates of one vertex of an equilateral triangle with centroid at the origin and the opposite side `x +y-2 =0`.A. (-1,1)B. (2,2)C. (-2,-2)D. none of these

Answer» Since the triangle is equilateral . Therefore , centroid coincides with the circumcentre and orthocentre . The equation of the perpendicular bisector of x + y - 2= 0 and passing through the centroid (0,0) is x - y = 0 .
The vertex of the triangle must lie on x- y = 0 and the origin and the vertex must lies on the same side of x + y - 2 = 0. So we can choose (-2,-2) as the vertex .


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