某车库的门禁如图所示,点
为旋转轴,门禁杆放平位置
与抬起位置
平行.若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433a98ddd0d795f6355fd0d4b9cbc41d.png)
______ °.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6b93dbe5272a5167ff4e2918bec864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d671d331e78f8e14a382153a6e967dbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433a98ddd0d795f6355fd0d4b9cbc41d.png)
22-23七年级下·北京昌平·期末 查看更多[3]
北京市昌平区2022-2023学年七年级下学期期末数学试题北京第三十五中学2023-2024学年七年级下学期期中数学试题(已下线)专题02 平行线的判定与性质【六大题型】-【好题汇编】备战2023-2024学年七年级数学下学期期末真题分类汇编(北京专用)
更新时间:2023-07-02 06:45:16
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【知识点】 根据平行线的性质求角的度数解读
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【推荐1】如图,将一副三角板如图摆放,点
在边
上,将图中的三角板
绕点
按每秒
的速度沿顺时针方向旋转
,在第________ 秒时,三角板
中恰有一边与边
平行.
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【推荐2】在螳螂的示意图中,
,
是等腰三角形,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/386cda9f96731510d52ec18199e18286.png)
______ .
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