题型:解答题-问答题
难度:0.65
引用次数:811
题号:6271511
(1)如图1,线段AC=6cm,线段BC=15cm,点M是AC
的中点,在CB上取一点N,使得CN:NB=1:2,求MN的长.
(2)如图2,∠BOE=2∠AOE,OF平分∠AOB,∠EOF=20°.求∠AOB.
![](https://img.xkw.com/dksih/QBM/2018/12/25/2104441866428416/2111514532921344/STEM/e1ac33e82d114126b9cddcd81589fcf3.png?resizew=5)
(2)如图2,∠BOE=2∠AOE,OF平分∠AOB,∠EOF=20°.求∠AOB.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/3/f3fcd3cc-15a7-4ecd-84d6-d9da43ede774.png?resizew=332)
更新时间:2018-04-09 15:28:35
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【推荐1】如图,点A、B是直线l上的两点,点C、D在直线l上且点C在点D的左侧,点D在点B的右侧,且AC=
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名校
【推荐2】已知:点
、
、
在直线
上,且点
是线段
的中点,点
是线段
的中点.
(1)如图1,若点
在线段
上,且
,
,求线段
的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/e5f65d40-9648-47a0-8c2d-4acc8093b755.png?resizew=258)
(2)如图2,若点
是线段
延长线上任一点,
的值是否变化?若不变,请求出其值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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(1)如图1,若点
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/53e17f77-495e-4101-8f24-f1d485a39636.png?resizew=369)
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解答题-证明题
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【推荐2】如图,在等腰
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