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Question 178218: If M(-2,2) is the midpoint of segment PQ and the coordinates of P are (-9,7), find the coordinates of Q?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! If M(-2,2) is the midpoint of segment PQ and the coordinates of P are (-9,7), find the coordinates of Q?
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Each coordinate of the midpoint is the average of the two corresponding
coordinates of the end points.
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Let the missing endpoint be (x,y)
x-coordinate: (x+(-9)/2 = -2
x-9 = -4
x = 5
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y-coordinate: (y+7)/2 = 2
y+7 = 4
y = -3
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Other endpoint: (5,-3)
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Cheers,
Stan H.
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