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The midpoint of segment AB is (4, 5). If A = (2, 3), what is B?
A(6, 8)
B(6, 7)
C(3, 4)
D(8, 7)
Answer & Solution
Correct answer: B. (6, 7)
(A + B)/2 = (4, 5) ⇒ B = 2·(4, 5) − A = (8, 10) − (2, 3) = (6, 7).
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