SOLUTION: how do i find the other endpoint when the other Endpoint (10,12) and midpoint (6,9)?

Question 772993: how do i find the other endpoint when the other Endpoint (10,12) and midpoint (6,9)?
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
how do i find the other endpoint when the other Endpoint (10,12) and midpoint (6,9)?
midpoint formula:
,
let (x,y)=coordinates of other endpoint
,=(6,9)
..
(10+x)/2)=6
10+x=12
x=2
..
(12+y)/2)=9
12+y=18
y=6
..
(x,y) coordinates of other endpoint: (2, 6)
check:
((10+2)/2, (12+6)/2)=(6, 9)
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