Question 246946: The midpoint of QR is M (-3,-5) One endpoint is Q (-11,-3) Find the coordinates of the other endpoint.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! The midpoint of QR is M (-3,-5) One endpoint is Q (-11,-3) Find the coordinates of the other endpoint
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The coordinates of the midpoint of a line segment are
the average of the corresponding coordinates of the endpoints.
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Let the other endpoint be (x,y)
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Equations:
(x+-11)/2 = -3
x-11 = -6
x = 5
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(y+-3)/2 = -5
y-3 = -10
y = -7
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Other end point is (5,-7)
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Cheers,
Stan H.
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