GMAT 考满分题库

Magoosh - 数学PS - 366
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The above 11 x 11 grid of dots is evenly spaced: each dot is separated by one unit, vertically or horizontally, from its nearest neighbors. Drawn in the diagram is a single right triangle with legs of length 2 & 1. How many right triangles, of this particular size and shape, in any orientation, can be formed by three dots from this grid?
  • A360
  • B480
  • C600
  • D720
  • E3600
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正确答案: D

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