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The midpoint formula: [(x1 + x2)/2, (y1 + y2)/2]

So for instance if your coordinates were endpoint : (-8,10) and the Midpoint: (-2,6)

By substituting the given values into the formula we have:

(x1 + -8)/2 = -2 and (y1 + 10)/2 = 6

x1 - 8 = -4 and y1 + 10 = 12

x1 -8 + 8 = -4 + 8 and y1 + 10 - 10 = 12 - 10

x1 = 4 and y1 = 2

so the endpoints coordinates are ( 4, 2)

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Q: How do you find an endpoint of a line if you are given an endpoint and the midpoint?
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