Find the coordinates of the midpoint of the segment AB, if A (-1,1,0); B (-2.0.4).

The task gives two points A and B with the corresponding coordinates A (-1; 1; 0) and B (-2; 0; 4). It is required to find the coordinates of the midpoint of the segment AB. Suppose that the point C with coordinates (xc; yc; zc) is the midpoint of the segment AB.
We use the formulas xc = (xa + xb) / 2, yc = (ya + yb) / 2, zc = (za + zb) / 2. We have: xc = (-1 + (-2)) / 2 = -3 / 2 = -1.5, yc = (1 + 0) / 2 = ½ = 0.5 and zc = (0 + 4) / 2 = 4/2 = 2. Thus, C (-1.5; 0.5; 2).
Answer: The coordinates of the middle of the segment AB are: (-1.5; 0.5; 2).