2. 外语
  3. In the preceding figure, each of the four squares has sides of length 2x. If triangle PQR is formed by joining the centers of th

In the preceding figure, each of the four squares has sides of length 2x. If triangle PQR is formed by joining the centers of th

admin2012-01-15  101
问题 In the preceding figure, each of the four squares has sides of length 2x. If triangle PQR is formed by joining the centers of three of the squares, what is the perimeter of triangle PQR in terms of x?
选项 A、 
B、 
C、 
D、 
E、 
答案D
解析
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