长度为x、3、5的三条线段可以构成三角形,则x的值可以是( )
A.2 | B.3 | C.8 | D.9 |
更新时间:2021-08-13 06:58:04
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【知识点】 确定第三边的取值范围解读
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【推荐1】若一个三角形的三边长分别为3 cm,5 cm,a cm,则a的取值范围是( )
A.3<a<5 | B.2<a<8 | C.3<a<8 | D.2<a<5 |
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【推荐2】如图,在
中,
.按以下步骤作图:分别以点
和
为圆心,大于
的长为半径作圆弧,两弧相交于点
和
;作直线
交
于点
,连结
.若
,则
的长可能是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/26/ed97e7bb-faeb-4245-b3fc-a1ba5b4ec67c.png?resizew=251)
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A.6cm | B.7cm | C.8cm | D.9cm |
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