Homework Help: math

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:

M-D = (-3,-5)
M+(-3,-5) = (-3,-9) = E

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