SOLUTION: Find the coordinates of the other endpoint of the segment, given its midpoint and one endpoint. midpoint(10,-1) endpoint(17,8) The other endpoint is? Write as ordered pair

Algebra ->  Length-and-distance -> SOLUTION: Find the coordinates of the other endpoint of the segment, given its midpoint and one endpoint. midpoint(10,-1) endpoint(17,8) The other endpoint is? Write as ordered pair      Log On


   

Question 895328: Find the coordinates of the other endpoint of the segment, given its midpoint and one endpoint.
midpoint(10,-1) endpoint(17,8)
The other endpoint is?
Write as ordered pair.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
The midpoint is the average of the x and y values of the endpoints.
x%5Bm%5D=%28x%5B1%5D%2Bx%5B2%5D%29%2F2
10=%2817%2Bx%5B2%5D%29%2F2
17%2Bx%5B2%5D=20
x%5B2%5D=3
.
.
y%5Bm%5D=%28y%5B1%5D%2By%5B2%5D%29%2F2
-1=%288%2By%5B2%5D%29%2F2
8%2By%5B2%5D=-2
y%5B2%5D=-10