四年级下册数学同步练习-7单元2课时-三角形的三边关系-苏教版解析
http://t.cn/Ri466E4苏教版小学数学四年级下册《三角形三边之间的关系》同步练习及参考答案所以【总结】本题考查的是三角形的三边关系,即三角形任意两边之和大于第三边,任意两边之差小于第三边3、一个三角形的两条边分别是8厘米、16厘米,那么第三条边最小是( )厘米.A.8B.9C.10D.11【考点】三角形的特性.【解析】根据三角形的三边关系求得第三边的取值范围,再看哪个选项内的数不在这个范围内即可.【答案】解:设第三边长x.根据三角形的三边关系,得16-8<x<16+8即:8<x<24(但不能是8厘米和24厘米).教育1http://t.cn/Ri466E4所以第三条边最小是9厘...
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