The mid point of CD is E(-1, 0). Endpoint is C(5, 2). What are the coordinates of the other endpoint

The coordinates of the midpoint of a line segment is the average of the coordinates of the endpoints. Calculations for the coordinates of the other endpoint are shown below.                 abscissa     -1 = (5 + x) / 2         ; x = -7                 ordinate       0 = (2 + x) / 2         ; y = -2Thus, the coordinates of the endpoint is (-7, -2).