已知三角形三边长分别为2,x,13,若x为正整数,则这样的三角形个数为(  )A.2 B.3 C.5 D.13

作者: tihaiku 人气: - 评论: 0
问题 已知三角形三边长分别为2,x,13,若x为正整数,则这样的三角形个数为(  )
选项 A.2 B.3 C.5 D.13
答案 B
解析 由于三角形两边之和大于第三边,两边之差小于第三边,故解得11

相关内容:三角形,三边,整数,个数

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