名校
1 . 如图,四边形
是矩形,
为
上一点,
.
作
的垂线
,垂足为
(只保留作图痕迹);
(2)在(1)的条件下,为了证明
,小马同学的想法为:先证明
.再利用矩形性质,得到结论,请根据小马同学的想法完成下面的填空.
证明:
四边形
是矩形,
∴
,
,
∵
,
∴
,
∵
,
∴
,
又∵
,
∴③ ,
∵
,
∴
,
∴
,
∴
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b85e359dd0247ef957a03a5e6d49aea6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(2)在(1)的条件下,为了证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6961ff0c507e6c21ee3af44e887c8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c8c958d24b70efc1656228dad973ec6.png)
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e29d6a382fb162f45fe85e6cc732084.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53542f3ff4125da7e16a0f7785a39e26.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cbfc35fc915ac7d4dc017e60ccdecbe.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba13df9b972ac891b7526ebb2fbb9b8.png)
又∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8cfd06965af6014208127f2880b476b.png)
∴③ ,
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddc7897e3f49075943704f4dbef82e5b.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca8d6a28490d7d2cd01a5c61b8df31c0.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a936837603d2bab444e2f3ede8e0ab.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6961ff0c507e6c21ee3af44e887c8c9.png)
您最近一年使用:0次
2024-05-25更新
|
215次组卷
|
2卷引用:重庆市南开中学校2023-2024学年八年级下学期期中数学试题
名校
2 . 如图,在
中,点E在边
上,连接
.
求作一点F,使得
;(保留作图痕迹,不写作法)
(2)若
,证明:四边形
为菱形.
证明:∵四边形
是平行四边形,
∴______________________
,
.
∵
,
∴
(
).
∴
,______________________.
∵
,
∴
,
∴______________________
∵
,
∴四边形
是平行四边形(______________________).(填推理依据)
∵
,
∴四边形
是菱形(______________________).(填推理依据)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/754f59660f49c228ae111e0357fb7417.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98de02d1d5b7ac04bce54be393218922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910936ec9fb419d51ce2f5ea817f8401.png)
证明:∵四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
∴______________________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9f07a876244afec67a0eca4d45c2e6.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5e1dc3473ec67beb52aaaba5645cacb.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26dba530ba1c15d3d3d5f90e0bf2810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4351a730f61bb998bab8f0b7848912d7.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9f07a876244afec67a0eca4d45c2e6.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f73f57e2287c50d910e3946c56530dca.png)
∴______________________
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
∴四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9766e5eb6796dafc5ffe212afdfc43c0.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98de02d1d5b7ac04bce54be393218922.png)
∴四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9766e5eb6796dafc5ffe212afdfc43c0.png)
您最近一年使用:0次
3 . 已知菱形
的面积为
,且
,连接对角线
,
相交于点O,点E是
边上一点,连接
交
于M.
,求
的长;
(2)如图2,将
绕点A顺时针旋转
,点E对应点F,连接
交
于点G,连接
,求证:
;
(3)如图3,将
沿射线
方向平移,得到
,连接
,
,请直接写出
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6093eebca8f3ff82ce9298feb197e955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3f5dc11efe60b4fd9a13b1d6b83842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
(2)如图2,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c57b07f75e97d9f84718bd495ebcf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6af2fe4396f208cdf7c9a1cdc63bcb9.png)
(3)如图3,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab41cce6eb2d3058a644314865d16548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/900b844294e8c07ea9a858adb845121c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/318c24a8507615c4a64745793c9a9c19.png)
您最近一年使用:0次
4 . 小明在学习了平行四边形后,对其进行了进一步的研究,发现如果作平行四边形任意一条对角线的垂直平分线,那么这条垂直平分线一定平分这个平行四边形的面积.他的思路是通过全等和图形的拼接得到面积相等.请根据思路完成以下作图与填空:
如图,在平行四边形
中,
.
的垂直平分线
交
于点E,交
于点F,垂足为O(保留作图痕迹,不写作法,不写结论);
(2)在(1)所作图形中,求证:
.
证明:
四边形
是平行四边形,
∴
,
,
①__________.
垂直平分
,
②__________.
又
③__________,
.
.
又
,
.
同理,
,
.
小明进一步研究发现,过平行四边形对角线中点的直线也有此特征.
请你依照题意完成下面命题:
过平行四边形对角线中点的直线④_____________________.
如图,在平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deb6694f3443cc5f4d09948679251b61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)在(1)所作图形中,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30036de857df0fdfc0bf840449ba578.png)
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d730ae4307db56b47849c3a19dedfb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b6640dd3f7a028d972c002645c8d8b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a8b8991caa2f5112e783b91155d1eec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173f7d26d069c0f16a0f6fcb517aa28c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
又
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c52d516579df902559ffbe9ab9148acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b35a6e83ca58dd766fbd926a8f5505.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/170fe589b2898df51cc44f5ad844b9d5.png)
又
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9453e2fefe053c341004b49a23235ca3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/182333bec6528fb597d77cb9fc8f9c02.png)
同理,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60735e55c52ce5dd46b0f40f6077c9b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acb8a917033d8529b443a0bde034506f.png)
小明进一步研究发现,过平行四边形对角线中点的直线也有此特征.
请你依照题意完成下面命题:
过平行四边形对角线中点的直线④_____________________.
您最近一年使用:0次
名校
5 . (1)用直尺和圆规,作
的垂直平分线交
于点
,交
于点
,垂足为点
.(只保留作图痕迹)
(2)已知:如图,四边形
是平行四边形,
是对角线,
垂直平分
,垂足为点
. 求证:
.
四边形
是平行四边形,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
,
① ,
垂直平分
,
② ,
又
③ ,
( ④ ),
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(2)已知:如图,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf2e3236ea30ee2c37928b98041f13a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fe2f6543e06a25493855fbbc648be6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd81911e3d7936c51075e53c8a4b0af6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173f7d26d069c0f16a0f6fcb517aa28c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
又
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5172757194a12e3545ec51ceb58911a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e5b72db46cdd46bd88563f79f378a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca634cd1689dcae34674e95e3b18f7d.png)
您最近一年使用:0次
6 . 在
中,
,
.点
为
内部一点,连接
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/f91311c4-5055-42ba-9c36-530577bddce8.png?resizew=456)
(1)如图1,若
,
,求点
到直线
的距离;
(2)如图2,以
为直角边作等腰直角
,
,线段
,
交于点
,若
,求证:
;
(3)如图3,点
在
边上,且
,点
为直线
上的一个动点,连接
,过点
作
,且满足
,连接
,当
最短时,请直接写出
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/f91311c4-5055-42ba-9c36-530577bddce8.png?resizew=456)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc13fe21e64d9b45614ed43be847904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8cc58ef27567f0ab06eb1012aec330.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
(2)如图2,以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3620030e8808da46df97330103827913.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9171484a68c84cad91e4f2233392f600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/737d79da434c3da5a5fbf14eab81e50e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23ec9d8556300a772755fbbeb0a0e0e1.png)
(3)如图3,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a630b7f9203444f73ef663191739d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03526fddc48f9f7298afc3da414c2e31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e78975a093cff021a4575926969b9b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0b7b1ad44a51e18faeb9b131c65bfae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07377d977ef6a8f518b3004564544e5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07377d977ef6a8f518b3004564544e5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be9baba5742fe32111ddd8a76fd5b265.png)
您最近一年使用:0次
7 . 等边
中,
于点
,点
为
边上一动点,连接
,点
关于直线
的对称点为点
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/21/0e2768bb-593f-48bc-a280-beeef96717fd.png?resizew=459)
(1)如图1,点
恰好落在
的延长线上,则求
______
;
(2)过点
作
交
于点
,连接
交
于点
.
①如图2,试判断线段
、
和
之间的数量关系,并说明理由:
②如图3,直线
交
于点
,连接
点运动的过程中.当
取最小值时,请直接写出线段
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e1ddf6c0c55a38dcb6750bba4e37341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cae003af00d9a4a443168a520360f7a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/21/0e2768bb-593f-48bc-a280-beeef96717fd.png?resizew=459)
(1)如图1,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b753dbb5a670dd4f5e23bb919e44dda2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afedac49ce38f25e0a73e579133afe5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
①如图2,试判断线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
②如图3,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74560a1dfdf34011663a5f4252eb7fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/767dbeffdf9182a42cce2a544a9f09cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
您最近一年使用:0次
8 . 在
中,
,
,过点B作直线l,点M在直线l上,连接
,且
,过C点作
交
于点N.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/1fa4af7e-f7bb-4d42-8621-d325e60bfe9a.png?resizew=392)
(1)如图1,请问
和
有怎样的数量关系,并证明;
(2)如图2,直线
交直线l于点H,求证:
;
(3)已知
,在直线l绕点B旋转的过程中,当
时,请直接写出
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57d9ffde7ed4798d1f263afa11ce39e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94318fcadd881db2331dc5c8e0536c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea6a116aada0941f623b7ad78ba24a1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/1fa4af7e-f7bb-4d42-8621-d325e60bfe9a.png?resizew=392)
(1)如图1,请问
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/474c0dc8c11624c4997e48b143bb09a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52f8eff113ca3f0d0200253c7c2f5a7a.png)
(2)如图2,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/162d5f1d22820eff92e3b9db0a139524.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb1c42dc950cf989e9df01e42556d292.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83042953e7f15e984b2da2ee9ca678d1.png)
您最近一年使用:0次
名校
9 . 如图,
中,在平面内将线段
绕点A逆时针旋转
得到线段
,过点D作
,分别交
、
于点E、F,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/91e1e8eb-5a9b-4b27-b5d8-b4b2d9743989.png?resizew=521)
(1)如图1,若
,
.求
的长度.
(2)如图2,若
,求证:
.
(3)如图3,在(2)问的条件下,若
,点P在射线
上运动,当
取得最小值为
时,在平面内将
绕点B逆时针旋转
度得到
,当点
恰好在线段
上时,请直接写出
的面积的值.
![](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/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/91e1e8eb-5a9b-4b27-b5d8-b4b2d9743989.png?resizew=521)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9693033557682abfd0bb71890fe2236e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c7317d43414d8d968f0cb11f533f1de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3313d2e682cf6220773ede4ef5a1630a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1cc7b820262053106a65b544e09996.png)
(3)如图3,在(2)问的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c786b48d3aff4d2f73f83cc1a32a094a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b11c09db2d6b7fe2af5b63b8ba8cc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb8fb6f3d7540831a9e97d3b184a491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/729684f958ad60b8e905fe1e1da53c03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a76ffa820a9a8ad7f536e01773249a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/159c881d8a2ca3796076523b06c2806e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c98be77bbbdabbc0b804b407762a66.png)
您最近一年使用:0次
10 . 如图,已知,经过点
的直线
与x轴交于B点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/c7fb2f2f-e070-4bd2-9fe8-45f9960d66b9.png?resizew=146)
(1)求直线
的函数表达式;
(2)用尺规作图:经过点A,作直线
的垂线,交y轴于点E;
(3)在(2)完成的图中,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6ec64d0616c70b9ecb87d645f1962fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdf6a9ed20ac6dfd41dd3721a4a4f361.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/c7fb2f2f-e070-4bd2-9fe8-45f9960d66b9.png?resizew=146)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)用尺规作图:经过点A,作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)在(2)完成的图中,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5fc6ead6416492c231c320a5486f86.png)
您最近一年使用:0次