Answer to Question #693 in Geometry for carolina

Question #693
Please, find the coordinate of the other endpoint of a segment with the given endpoint and midpoint M:

R(2,6)
M(-1,1)
1
Expert's answer
2010-09-28T01:41:00-0400
Let (x,y) be the coordinates of other endpoint.
The expressions for the coordinate of midpoint are
(x+2)/2=-1 and (y+6)/2=1;
thus
x=-4; y=-4
The answer: L(-4,-4)

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