Geometryhard · Past Paper
If a line segment of length 10 has one endpoint at (3, 2) and the other endpoint has x-coordinate 11, find the possible y-coordinates.
A8 or -4
B8
C4 or -8
D0
✓ Correct Answer: A — 8 or -4
(11-3)^2 + (y-2)^2 = 10^2 => 64 + (y-2)^2 = 100 => (y-2)^2 = 36 => y-2 = +/-6. y = 8 or -4.
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