Posted by claire on Friday, November 30, 2012 at 12:43pm.
for the line segment DE one edpoint is D(3,1) and the midpoint is M (0,4). find the coordinates of endpoint E.

math  Steve, Friday, November 30, 2012 at 1:05pm
Since M is halfway from D to E, figure the difference between M and D and go that far again past M:
MD = (3,5)
M+(3,5) = (3,9) = E
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