Question

Point m is the midpoint of line ab. if the coordinates of m are 2,8) and the coordinates of a are (10,12) what are the coordinates of b

Answer 1

midpoint = (2, 8)

coordinate a = (10. 12)

let coordinate b = (x, y)

Find x:

0.5(10 + x) = 2

10 + x = 4 

x = 4 - 10

x = -6

Find y:

0.5(12 + y) = 8

12 + y = 16

y = 16 - 12 

y = 4

Answer: Coordinate b = (-6, 4)