Question

Use the given endpoint Y and midpoint M of YZ to find the coordinates of the other endpoint Z.

7(-1, -3), M(5, 9)

Answer 1

Z (11,21)

Explanation:

Midpoints

x = (x1 + x2)/2

5 = (-1 + x2)/2

10 = -1 + x2

x2 = 11

y = (y1 + y2)/2

9 = (-3 + y2)/2

18 = -3 + y2

y = 21