In \(\triangle ABC\), AD is a median, \(BC = 10\) and \(AD = 6\). Then \(AB^2 + AC^2 = \)
A. 72
B. 100
C. 122
D. 136
A. 72
B. 100
C. 122
D. 136
Best answer
Answer: C. 122
By Apollonius' theorem, \(AB^2 + AC^2 = 2AD^2 + 2BD^2 = 2(36) + 2(25) = 122\) (since \(BD = 5\)).
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