1 . 如图,
中,
分别在射线
上滑动,开始时,点
与点
重合.当点
向点
运动时,点
沿着
方向运动(保持
形状不变),点
从起始位置运动到点
的过程中,点
的运动轨迹的长度是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88caf684bf220b0dad460d75361bdd05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d81451aab89c418bd1b7996627b58c44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2281b85925f638db0eb6cfe27d0558f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/0fd0237a-4b80-4eb7-baa8-67e5a519fbe0.png?resizew=152)
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名校
2 . 函数
图像与
轴交于点
,将函数图像绕点
顺时针方向旋转
后得到的函数图像对应的表达式是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e192225e485cbfc7fedaa57af03798.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
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3 . 如图,
内接于
,
为直径,点
在
上,过点
作
的切线与
的延长线交于点
,点
是弧
的中点,连结
交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/fc2e8e52-85f2-4470-9cdc-e8603a0d11ca.png?resizew=140)
(1)求证:
;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.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/8455657dde27aabe6adb7b188e031c11.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/fc2e8e52-85f2-4470-9cdc-e8603a0d11ca.png?resizew=140)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7b668319803b03b153e48cabfaa5cad.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb3d814a5e87bf9969c779c306a27a81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d4f31d75018a8724ec93939706603b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
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4 . 在四边形
中,
,求
的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf87862cc8967ee948741ac8c3a31c93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/53ba111b-9e15-49a1-9010-6d642327e9bb.png?resizew=128)
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5 . 如图,在矩形ABCD中,
,动点M从点A出发,沿边AD向点D匀速运动,动点N从点B出发,沿边BC向点C匀速运动,连接MN.动点M,N同时出发,点M运动的速度为
,点N运动的速度为
,且
.当点N到达点C时,M,N两点同时停止运动.在运动过程中,将四边形MABN沿MN翻折,得到四边形
.若在某一时刻,点B的对应点
恰好与CD的中点重合,则
的值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ec2daeb3938525290d6683f72edd3f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f44c235d8b49207ad3f2d77dc5d6cf20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/814f55724f7ee57bd395eb3b95393c68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e860d8d9f1f38d5e290a2b41eb9abc15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e01a2ce173375f3fe39cea14e22c1cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5326817f9af012432a202749d1df59f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721b8f1cfa324a7d07c3544256eb14a3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/b9982d1f-5060-412f-a037-4b2cb35856c7.png?resizew=150)
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6 . 如图,将矩形ABCD沿对角线AC折叠,点B的对应点为点E,AE与CD交于点F.
(1)求证:
;
(2)若
,求
的度数.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/4293ccb4-ad8f-4234-8779-ad87e3861ac2.png?resizew=189)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/166f01721ec17fce2b6b2b84534a8a5d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fe93af971d59aeb8480f06c8800b38f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
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7 . 勾股定理是人类耻伟大的科学发现之一,在我国古算书《周髀算经》中早有记载.如图1,在
中,
,以
的各边为边分别向外作正方形,再将较小的两个正方形按图2所示放置,连结MG,DC.若
,且
,则AB的长为()
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/1531a296-a9e9-42b0-8ce8-3e9ea944a005.png?resizew=293)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea86458ea28ef2799c6be99181a2c62e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00db6c68c62d042f63660b6139e856bf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/1531a296-a9e9-42b0-8ce8-3e9ea944a005.png?resizew=293)
A.![]() | B.![]() | C.![]() | D.![]() |
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8 . 如图,扇形
的半径为1,圆心角是90°.点
是
上一动点,
于点
,
于点
,点
、
、
、
分别是线段
、
、
、
的中点,
与
相交于点
,
与
相交于点
.
(1)求证:四边形
是平行四边形;
(2)探索当
的长为何值时,四边形
是矩形;
(3)连结
,试说明
是定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e17dc84ba2e871aeb3a3fd2a2b5f1a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84441c70564cd068d2668085957c3fce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee9d78e5383cd018ba74d911c9976bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc93e193fad261689949a52819753f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/29/c75e3040-f073-4a63-8714-ab42ba86db6c.png?resizew=164)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2fafaec5283b313a43ab0502280799c.png)
(2)探索当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2fafaec5283b313a43ab0502280799c.png)
(3)连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb43fd99a100d46d7feecb3edc6397ea.png)
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9 . 如图,在直角三角形
中,
,
.点
是半圆弧
的中点,连接
,线段
把图形
分成两部分,则这两部分面积之差的绝对值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae15e5357601ddb7e303b56dbe337145.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b022d4e7d1009da1874cd169bb33ea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/29/6e7fce2f-d467-4b3f-8204-b6d0b70c0164.png?resizew=140)
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名校
10 . 如图,矩形ABCD的长AD=9cm,宽AB=3cm,将其折叠,使点D与点B重合,那么折叠后DE的长和折痕EF的长分别为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/15/2517244b-8950-4951-a9f6-8f7ffe0f02e6.png?resizew=309)
A.4cm ,![]() | B.5cm ,![]() |
C.4cm ,![]() | D.5cm, ![]() |
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