对不起
我突然忘了3角型的边长定义
帮帮我吧谢谢各位
題目是GMATPREP的
If 2 side of triangle are 2 and 5 which of the following can be its perimeter
1)19
2)15
3) 9
Answer: None
任两边之和大于第三边
任两边之差小于第三边
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