在正方形ABCD内有一点P,
,
,
.求∠APB的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab2c27eac56fffa4cd7dbe1dcdf1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26a42b05e06fe34d66538930787bb3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e50bb1dd9445589b1d465cabf3873afc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/6975366e-4064-473c-8de1-e6e7249c9195.png?resizew=153)
更新时间:2022-12-19 16:16:31
|
相似题推荐
解答题-问答题
|
适中
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【推荐2】如图,在平面直角坐标系中,点A,B分别是y轴和x轴的正半轴上的动点,正方形
的顶点C,D在第一象限.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/bae12549-7616-4573-a76e-977df1829578.png?resizew=377)
(1)当
,
时,正方形
的顶点D恰好在反比例函数
(k为常数,
)的图象上,求k的值;
(2)保持
不变,移动点A,B,使
,求此时点D的坐标,并判断点D是否在(1)中的反比例函数图象上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/bae12549-7616-4573-a76e-977df1829578.png?resizew=377)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1df17440481c8da8e0a17f008dbc4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311c988c5f2c26f9eb7de8bad7cc46eb.png)
(2)保持
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a1fc02e797b12883e13941c1de4c74.png)
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名校
【推荐1】【概念呈现】:
当一个凸四边形的一条对角线把原四边形分成两个三角形.若其中有一个三角形是等腰直角三角形,则把这条对角线叫做这个四边形的“等腰直角线”,把这个四边形叫做“等腰直角四边形”;当一个凸四边形的一条对角线把原四边形分成两个三角形,若其中一个三角形是等腰直角三角形,另一个三角形是等腰三角形,则把这条对角线叫做这个四边形的“真等腰直角线”,把这个四边形叫做“真等腰直角四边形”.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/f447478a-5687-473a-a16a-42490eb9540f.png?resizew=381)
(1)【概念理解】如图①,若
,
,
,则四边形
__________(填“是”或“否”)真等腰直角四边形;
(2)【性质应用】如图①,如果四边形
是真等腰直角四边形,且
,对角线
是这个四边形的真等腰直角线,当
,
时,
__________;
(3)【深度理解】如图②,四边形
与四边形
都是等腰直角四边形,且
,
,
,对角线
、
分别是这两个四边形的等腰直角线,试说明
与
的数量关系,并说明理由.
当一个凸四边形的一条对角线把原四边形分成两个三角形.若其中有一个三角形是等腰直角三角形,则把这条对角线叫做这个四边形的“等腰直角线”,把这个四边形叫做“等腰直角四边形”;当一个凸四边形的一条对角线把原四边形分成两个三角形,若其中一个三角形是等腰直角三角形,另一个三角形是等腰三角形,则把这条对角线叫做这个四边形的“真等腰直角线”,把这个四边形叫做“真等腰直角四边形”.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/f447478a-5687-473a-a16a-42490eb9540f.png?resizew=381)
(1)【概念理解】如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a2f4950d53dd29233016737c45cb6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f144992e1cbee34868abce1e5ad38c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)【性质应用】如图①,如果四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a20cb14fea4a7cad4b7775a3dd67df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf7679c8b4b1e442ce4286d4b0e9c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f92336571fa2d98813029b8c3c8a6f0.png)
(3)【深度理解】如图②,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a20cb14fea4a7cad4b7775a3dd67df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb64353c99068a7a1a8508a22f5b25b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d19aee2a7549f958e28f7136178e4eb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
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【推荐2】在数学兴趣小组活动中,小亮进行数学探究活动.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/3de60d75-2b7d-4f01-b30c-04da86d9d8e4.png?resizew=416)
(1)
是边长为3的等边三角形,E是边
上的一点,且
,小亮以
为边作等边三角形
,如图①,求
的长;
(2)
是边长为3的等边三角形,E是边
上的一个动点,小亮以
为边作等边三角形
,如图②,在点E从点C到点A的运动过程中,求点F所经过的路径长;
(3)
是边长为3的等边三角形,M是高
上的一个动点,小亮以
为边作等边三角形
,如图③,在点M从点C到点D的运动过程中,求点N所经过的路径长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/3de60d75-2b7d-4f01-b30c-04da86d9d8e4.png?resizew=416)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212a67f115d1cbe69f100b489babe5f8.png)
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【推荐1】如图1,正方形
内接于
,连接
,
是
上的动点(不与点
重合),连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/8fe2b7a2-222b-4d07-b029-007fc5896441.png?resizew=268)
(1)如图2,当
是
的中点时,过点
作
的切线,与
的延长线交于点
.
①
与
之间的位置关系是 ,并说明理由;
②求
的度数;
(2)连接
,请直接写出
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80672dda9430cb42b3136bcb1b67bbad.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/8fe2b7a2-222b-4d07-b029-007fc5896441.png?resizew=268)
(1)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80672dda9430cb42b3136bcb1b67bbad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eab64bf465405cd87bb03f8cb61cb315.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb83244bba01e7f100bb94e57c01b0.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d48943db264c08adaf6ae0766fd56459.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34ee591d1ab0ca1cc7c8c454e6852c25.png)
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【推荐2】在一节综合实践课上,老师让同学们用一张正方形纸板制作一个无盖正方体形纸盒,其具体操作如下:步骤
:如图
,将正方形纸板的边长三等分,画出九个相同的小正方形,并剪去四个角上的小正方形;步骤
:如图
,把剪好的纸板折成无盖正方体形纸盒.
与纸盒上
的大小关系为:
(填“
”);
(2)请证明(
)中你发现的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38f6b22b844aec1e37eb5d6c0d423350.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f8135bff743dbfd3bf2554460d26bb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18ca9aa6c697ad83eee3c194d79246c2.png)
(2)请证明(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
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【推荐1】如图,在
中,
,
,将
绕点
沿逆时针方向旋转
得到
.
(1)线段
的长是 ,
的度数是 ;
(2)连接
,求证:四边形
是平行四边形;
(3)求点
旋转到点
的位置所经过的路线的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b352fa3e781df195ceccca90c3932a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94ec371d5dbc19d236bf8a1f084031e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e7dc4df7105a0d376abd6efa5159b29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb99c20237aca8ff2ba640c28fbc5b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/4/d38194f7-8e38-40b2-b705-c89ff561e6f1.png?resizew=215)
(1)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4195334905e2f190f958dbf5951456f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b02210cb6528fdaf2ebb66c7777191.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d6af7757f9f41d515dd102936b8bfe7.png)
(3)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
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解答题-作图题
|
适中
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【推荐2】
中,
,将线段
绕点A逆时针旋转
得到线段
.作射线
,点C关于射线
的对称点为点E.连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/fe1daa32-dc84-4512-9033-896ac6dc31ec.png?resizew=236)
(1)依题意补全图形;
(2)若
,直接写出
的度数;
(3)写出一个
的值,使
时,线段
的长为
,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b18755ce1eaa81a75096a6e4aff0ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b40aa8d2482d698ebef69cf225f99f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/fe1daa32-dc84-4512-9033-896ac6dc31ec.png?resizew=236)
(1)依题意补全图形;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7209c73ac82338a7def4decc693dc633.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4598486f8c5ac28b1165b76e78105979.png)
(3)写出一个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b0393ce62b24aa5f9b740d4cc6743b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9563540452712a60d70f76cf22a868c9.png)
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