如图,延长线段AB到C,使BC=3AB,点D是线段BC的中点,如果CD=9cm,那么线段AC的长度是多少?
![](https://img.xkw.com/dksih/QBM/2021/1/16/2637303365640192/2638886898352128/STEM/11cc93fb-618c-4aa7-8ccd-efe867063af9.png)
更新时间:2021-01-18 18:12:02
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适中
(0.65)
【推荐1】若点
是线段
的中点,点
在直线
上,点
是线段
的中点,且
,
,那么线段
的长度是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/861782b8bb24df197194d9400c8e88a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d92a746d9b7304bcfc4e1e7869d145a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/67e88d0d-7ea8-4a62-8c0c-be1692872aeb.png?resizew=195)
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解答题-问答题
|
适中
(0.65)
【推荐2】(1)已知点D是线段
的中点,点B在线段
上,且
,若
,求
的长.
(2)如图,
是
的角平分线,
,
.求
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d5c758ec057b10c14aad4c6ff9faa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4f71a52438196c3aca604fa927be8e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526eb61414ea087f9970c4c0211eff9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66af677a4b699f8f9e47628a08e3057f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e7b8a59f8d66176463f3d71f882a26.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/cdc6b969-7ff8-4daf-9543-0b4c9ac9403b.png?resizew=317)
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