SOLUTION: the midpoint of AB is M(9,7).One endpoint is A(3,9).Find the coordinates of endpoint B.

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Question 649727: the midpoint of AB is M(9,7).One endpoint is A(3,9).Find the coordinates of endpoint B.
Answer by Alan3354(69443) About Me  (Show Source):
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the midpoint of AB is M(9,7).One endpoint is A(3,9).Find the coordinates of endpoint B.
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The difference in x & y have to equal the difference from A to M.
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diffx = 9-3 = 6 --> x = 9+6 = 15
diffy = 7-9 = -2 --> y = 7-2 = 5
--> B @ (15,5)