阿摩線上測驗
15. Suppose that △ ABC is an equilateral triangle of side length s, with the property that there is a unique point P inside the triangle such that 
. What is the value of ??
(A)
(B)
(C) 8
(D)
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統計： A(4), B(12), C(7), D(8), E(0) #3125593
統計： A(4), B(12), C(7), D(8), E(0) #3125593
