The Midpoint Formula
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State
The midpoint formula averages the coordinates of two endpoints: M = ((x₁ + x₂)/2, (y₁ + y₂)/2).
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For (1, 2) and (4, 6), the midpoint is (5/2, 8/2) = (2.5, 4) — halfway across and halfway up, the segment's exact center.
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Averages add then halve; distances subtract.
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