Mathematics > Standard Multiple Choice

Read the following SAT test question and then click on a button to select your answer.

A, B, C, and D are points on a line, with D the midpoint of segment line B C. The lengths of segments line A B, line A C, and line B C are 10, 2, and 12, respectively. What is the length of segment line A D?

(A) 2

(B) 4

(C) 6

(D) 10

(E) 12 

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