Mathematics
bouncer
2016-09-28 20:08:06
The midpoint of CD is M(–1, –2). One endpoint is C(–9, –4). Find the coordinates of the other endpoint D
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spidy
2016-09-28 20:21:03

what i do is that i put the endpoint coordinate first and then on the bottom i put the midpoint coordinate. (-9, -4) (-1, -2) then i find the difference from endpoint one to the midpoint +8 and +2 i apply that to the midpoint to the second coordinate (-1, -2)    +8 +2 endpoint: (7, 0)  you can check using the midpoint formula ( x + x / 2, y + y / 2)

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