If the co-ordinates of the mid-points of the sides of a triangle are (1, 2), (0, -1) and (2, -1), find the co-ordinates of its vertices.
Solution not provided.
Ans. (1, -4), (3, 2), (-1, 2)
Find the co-ordinates of the point equidistant from the points A(1, 2), B(3, -4) and C(5, -6).