题目内容
在1,2,3,4,5,6,7,8,9这9个数中,任取三个不同的数,构成三角形的三边长,那么这样的三个数共有( )种不同的取法?
A.33 | B.34 | C.35 | D.36 |
从9个数中,任取三个不同的数,构成三角形的三边长可以列举如下:
234,245,256,267,278,289,
345,346,356,357,367,368,378,379,389
456,457,458,467,468,469,478,479,489,
567,568,569,578,579,589,
678,679.,689,
789,
共有34种结果,
故选B.
234,245,256,267,278,289,
345,346,356,357,367,368,378,379,389
456,457,458,467,468,469,478,479,489,
567,568,569,578,579,589,
678,679.,689,
789,
共有34种结果,
故选B.
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