The midpoint of segment AB is M(-3, 3). The coordinates of point A are (1, 8). Find the coordinates of point B.

Question

Please help.

Answer 1

We'll use the formulas for midpoint coordinates:

 

x coordinate of midpoint is -3 = (1 + x)/2 and you can solve for x, the coordinate of endpoint B.

 

y coordinate of midpoint is 3 = (8 + y)/2 and you can solve for y, the coordinate of endpoint B.