Question

Two points have coordinates A(1, 1, 3) and M(11, 3, 0.5). M is the midpoint of
AB. Find the coordinates of B.

Answer 1

Answer:

Let B=(a, b, c)

(a+1,b+1,c+3)/2=(11,3,1/2)

a+1=22,b+1=6,c+3=1

(a,b,c)=(21,5,-2)

Answer 2

Answer:

Follow the steps in the picture. Use the midpoint formula