配套习题- 巧用三角形的三边关系解题 -【青果学院】

1/5单选题

难度：

1.两边长为10和3，第三边长为整数，这样的三边组成的三角形有（　　）个

A	3
B	4
C	5
D	6

正确答案：Qw==

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

2/5单选题

难度：

2.现有四根木棒，长度分别为4cm，6cm，8cm，10cm，从中任取三根木棒，能组成三角形的个数为（　　）个

A	1
B	2
C	3
D	4

正确答案：Qw==

6Kej77ya5YWx5pyJNOenjeaWueahiO+8mjxicj7ikaDlj5Y0Y23vvIw2Y23vvIw4Y23vvJvnlLHkuo44LTTvvJw277ycOCs077yM6IO95p6E5oiQ5LiJ6KeS5b2i77ybPGJyPuKRoeWPljRjbe+8jDhjbe+8jDEwY23vvJvnlLHkuo4xMC0077ycOO+8nDEwKzTvvIzog73mnoTmiJDkuInop5LlvaLvvJs8YnI+4pGi5Y+WNGNt77yMNmNt77yMMTBjbe+8m+eUseS6jjY9MTAtNO+8jOS4jeiDveaehOaIkOS4ieinkuW9ou+8jOatpOenjeaDheWGteS4jeaIkOeri++8mzxicj7ikaPlj5Y2Y23vvIw4Y23vvIwxMGNt77yb55Sx5LqOMTAtNu+8nDjvvJwxMCs277yM6IO95p6E5oiQ5LiJ6KeS5b2iLiA8YnI+5omA5Lul5pyJM+enjeaWueahiOespuWQiOimgeaxgi4g

3/5单选题

难度：

3.一个三角形的三条边长分别为

，则

的取值范围是（　　）

A
B
C
D

正确答案：RA==

6Kej77ya5qC55o2u6aKY5oSP5b6X77yaPGltZyB3aWR0aD0xMDAgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMDkvRDgvckJBQ0UxTlVpMnZoTGZRV0FBQUIxSTJRSmlnNzQzLnBuZyI+PGJyPuWNszxpbWcgd2lkdGg9NTEgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvQ0QvQkMvckJBQ0ZGTlVpMnZ6ajhuNUFBQUJrR1RRRlZNNTIxLnBuZyI+

4/5单选题

难度：

4.已知三角形的两边长分别为3和8，则此三角形的最长边

的取值范围是（　　）

A
B
C
D

正确答案：RA==

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

5/5单选题

难度：

5.若等腰三角形有两条边的长度为3和1，则此等腰三角形的周长为（　　）

A	5
B	7
C	5或7
D	6

正确答案：Qg==

6Kej77ya77yIMe+8ieW9kzPkuLrlupXml7bvvIzlhbblroPkuKTovrnpg73kuLox77yMPGJyPuKItTErMe+8nDPvvIwg4oi05LiN6IO95p6E5oiQ5LiJ6KeS5b2i77yM5pWF6IiN5Y6777yMPGJyPu+8iDLvvInlvZMz5Li66IWw5pe277yM5YW25a6D5Lik6L655Li6M+WSjDHvvIw8YnI+M+OAgTPjgIEx5Y+v5Lul5p6E5oiQ5LiJ6KeS5b2i77yM5ZGo6ZW/5Li6Ny4g