解答题-问答题 适中0.65 引用0 组卷811
(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/editorImg/2022/9/3/f3fcd3cc-15a7-4ecd-84d6-d9da43ede774.png?resizew=332)
![](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)
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