把两个三角尺按如图所示那样拼在一起(三角尺分别含
角,点A、C、D在一条直线上)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/04df743c-6675-4956-a142-6f53fec3c25a.png?resizew=140)
(1)求
的度数;
(2)若
是
的平分线,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a69231a142c187f26dc4c0e82d8ad24.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/04df743c-6675-4956-a142-6f53fec3c25a.png?resizew=140)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a2db6311e228ed33b6c71d0a5918cf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db866ecc0c098bfc32ec8a43b65bdd58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb3748300134501953d6b1c3a905026.png)
更新时间:2024-01-25 16:05:11
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【推荐1】如图,直线AB、CD、EF都经过点O,且AB⊥CD,∠COE=35°,求∠AOE、∠BOE的度数。
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/25/e0b4b217-5bd7-478d-b906-74e281b202b2.png?resizew=195)
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【推荐2】如图①,点
为直线
上一点,
,将一直角三角板的
角的顶点放在店
处,斜边
在射线
上,直角顶点
在直线
的下方.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/13/a27035d8-883e-4fb8-afc1-32771cf9a8be.png?resizew=280)
(1)在图①中,求
和
的度数;
(2)将图①中的三角板绕点
按每秒
的速度沿逆时针方向旋转一周,在旋转的过程中,第
秒时,
边恰好平分
,第
秒时,
边在
的平分线上,请分别求出
的值;
(3)将图①中的三角板绕点
顺时针方向旋转至图②,使
边在
的内部,
边在
的外部,请研究:
与
之间的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334528b4f29f9301875430197753b630.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/13/a27035d8-883e-4fb8-afc1-32771cf9a8be.png?resizew=280)
(1)在图①中,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e7b8a59f8d66176463f3d71f882a26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66570f697459aba9daa2eaf9460bcb.png)
(2)将图①中的三角板绕点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/741a44528782580d24249e8075b8cd9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d708cb763716467219215cdc0782c0a6.png)
(3)将图①中的三角板绕点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/418ebb89d29f4f631b055c911e8d178a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf7a961a55aa7f225fadb6a25a60c75.png)
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(0.94)
【推荐2】如图,BD平分∠ABC,
,且
,求∠ABC和∠ABE的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3374e25eecd38fbdd928561be1248670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15d713f85ae87b54b34541d770b8fcdc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/781e0855-81a2-4c60-9bbc-113b41cc5623.png?resizew=221)
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