如图,直线
,直线
与
,
分别交于点
,
,
,小安将一个直角三角形
按如图①放置,使点
、
分别在直线
、
上,
,
.
与
的大小关系,并说明理由;
(2)若
的平分线
交直线
于点
,如图②.
①当
,
时,求
的度数;
②小安将三角形
沿直线
左右移动,保持
,点
、
分别在直线
和直线
上移动,在平移过程中求
的度数(用含
的式子表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1acb6d13c128aea0a8fc38de4f3ca4b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ce50ba5e349425274f05d46d120a74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bba8e0d0a84be821e404c93852543ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/552cfbf9d051c4e58e1736a2965982fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/931beb39d4195978ced2fbc666fa1bae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19768d8c55deb4973820aeab7a224e6a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67327208e852af5499e367796b35d162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5dbfcff5c8b5d4e312a9247b2b8b0a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2b6f26f81404f16f2b29714ac1b9ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/384de89ffa3abe2329d5b1f35b4c1c63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
②小安将三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ce50ba5e349425274f05d46d120a74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/384de89ffa3abe2329d5b1f35b4c1c63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
2024七年级下·浙江·专题练习 查看更多[1]
(已下线)专题01 平行线(8题型)【好题汇编】-备战2023-2024学年七年级数学下学期期中真题分类汇编(浙教版)
更新时间:2024-04-20 18:00:59
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,直线AB,CD相交于点O,OE平分∠BOC,OF⊥OE,且∠AOC=114°,求∠BOF的度数.
![](https://img.xkw.com/dksih/QBM/2018/2/5/1875856266690560/1877500547981312/STEM/65054e11e87f4b938896361640d3d9f2.png?resizew=161)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,直线AB与CD相交于点O,OP是∠AOD的平分线,OE⊥AB,OF⊥CD.
(1)图中除直角外,还有相等的角吗?请写出两对:① ;② .
(2)如果∠AOP=14°.
①因为OP是∠AOD的平分线,所以∠AOD=2∠ = 度.
②那么根据 ,可得∠BOC= 度.
③求∠BOF的度数.
(1)图中除直角外,还有相等的角吗?请写出两对:① ;② .
(2)如果∠AOP=14°.
①因为OP是∠AOD的平分线,所以∠AOD=2∠ = 度.
②那么根据 ,可得∠BOC= 度.
③求∠BOF的度数.
![](https://img.xkw.com/dksih/QBM/2019/1/3/2110708639776768/2113698359664640/STEM/deb1d17b38d949b79a83f1a042c10013.png?resizew=195)
您最近一年使用:0次
【推荐1】(1)如图1,
,求
的度数. (提示:作
).
(2)如图2,
,当点
在线段
上运动时,
,求
与
、
之间的数量关系,并说明理由.
(3)在(2)的条件下,如果点
在射线
上运动,请你直接写出
与
、
之间的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcab3553044afa749f80aafae694db51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3c1375c64dceef45846308a418cf7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df8a30f167bf0b45092bb068b431eb15.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d31600cba2d5256c7e78b6122d6755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f5630f34d25331fa09132e8eb6af6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8492a81bcdeeda9b89d0e66f1f58a4af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15417741fba20d681ab4414b07339099.png)
(3)在(2)的条件下,如果点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8492a81bcdeeda9b89d0e66f1f58a4af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15417741fba20d681ab4414b07339099.png)
![](https://img.xkw.com/dksih/QBM/2020/2/21/2404028300877824/2404549444542464/STEM/a489ff025d4942a2a0a5d35e2d03998d.png?resizew=402)
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