如图,如果AB∥CD,AE平分∠BAC,CE平分∠ACD,试说明AE⊥CE.
![](https://img.xkw.com/dksih/QBM/2012/7/22/1573463260569600/1573463281795072/STEM/422ee5650a6042c09b03439d5a82330c.png)
11-12七年级下·山东菏泽·期末 查看更多[2]
更新时间:2016-12-05 11:22:09
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【推荐1】如图,点A,D在直线a上,点B,C在直线b上,a∥b,BA⊥a,连结AC.
(1)写出与∠C相等的角;
(2)求∠BAC+∠C等于多少度.
(1)写出与∠C相等的角;
(2)求∠BAC+∠C等于多少度.
![](https://img.xkw.com/dksih/QBM/2020/10/15/2571316713865216/2573200413245440/STEM/1f049e9ddc4b47d3a779f183190d210e.png?resizew=140)
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【推荐2】如图,在四边形
中,
,
,
平分
,E是
上一点,
交
于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/12/6013e436-0c07-4771-95b6-02436e94b8fe.png?resizew=238)
(1)求
的大小;
(2)若
,求
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3af5e6206ed562200ff93e9d9a3eb107.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727ad3e630a224303d6d3b8ad5c114ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a24ee04b7e461c045431ce83d15a91de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/12/6013e436-0c07-4771-95b6-02436e94b8fe.png?resizew=238)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721c75fcd58d3d54260aad0f82e09e37.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de30c97b9e954dd5375725910bf0c10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
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