如图,在平面直角坐标系
中,已知点
,点
,以
为直径作
交
于点C,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/45c338d0-71ae-4a52-a1e3-5013b52a0b8b.png?resizew=398)
(1)求
的长;
(2)连接并延长
,射线
分别交
于点E,F(点E在y轴左侧),连接
,求
;
(3)点P是射线
上一动点,连接
,过点C作
于点H,连接
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1fbcb0d5786b3b3688395e93eeb5ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7af5493d8a793beda23d649ab8448432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/45c338d0-71ae-4a52-a1e3-5013b52a0b8b.png?resizew=398)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)连接并延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e113e9c4791185cdbdb0c179358fe8fa.png)
(3)点P是射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b9df5a1f66da3c5ba7dd1828296bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4cd68cc82e90a5e2049a7ea3171b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4cd68cc82e90a5e2049a7ea3171b84.png)
2023·广东湛江·二模 查看更多[2]
更新时间:2023-12-16 08:08:43
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相似题推荐
解答题-问答题
|
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【推荐1】问题提出
(1)如图1,在矩形
中,
是对角线
上一动点,
,则
的最小值为________.
问题探究
(2)如图2,在四边形
中,
.
分别为
边上的动点(含端点),
分别为
的中点,当
的值最小时,求点
到
的最短距离.
问题解决
(3)如图3,已知菱形
是一块空地,其中
为
中点,
分别是对角线
,边
上的动点(含端点),某学校在开学前,计划举办新生欢迎仪式,需要在这块空地上沿着
铺设两条红毯.已知红毯单价是160元/米,问举行新生欢迎仪式时,铺设红毯至少需要花费多少钱?(结果保留根号)
(1)如图1,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/73ba94cec6c03980be9ca03774379fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc64a8b5dfdf266f806e0d4293dcfd3f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/17/e52e8e40-573c-40a1-b357-e7de3fa1f0eb.png?resizew=137)
问题探究
(2)如图2,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a014800c604092c13dfbd90ea621f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374fe9986ebbc986fc422e514ab93a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c700aba9c6abc4f9e93fbc268929b9a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/17/f85461ec-cce2-4f67-9cd7-3fb2ee73a62c.png?resizew=198)
问题解决
(3)如图3,已知菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d1bacb3cb00f5928cfd1f5d1756108b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23d7ef454aa07765aeea22895988b2fa.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/1d79eb551b8051aea9beeed2ce16f18f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/17/59c4decd-11da-4f62-bc63-81a3ee53a6b4.png?resizew=195)
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【推荐2】将一把三角尺放在边长为1的正方形
上,并使它的直角顶点P在对角线
上滑动,直角的一边始终经过点B,另一边与射线
相交于点Q,设
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/9/81515df8-fe7f-4faf-867b-e9a4ecedf844.png?resizew=470)
(1)当点Q在边
上时,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3065bf0c45e88f3ee304fd73c441dec9.png)
(2)当点Q在
上时,设四边形
的面积为
,求y与x之间的函数关系式,并直接写出x的取值范围;
(3)当点P在线段
上滑动时,且Q在
延长线上时,
能否为等腰三角形?若能,求出x的值.若不能,说明理由.
![](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/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8711eddf26d11fc974dfb6da4b640918.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/9/81515df8-fe7f-4faf-867b-e9a4ecedf844.png?resizew=470)
(1)当点Q在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3065bf0c45e88f3ee304fd73c441dec9.png)
(2)当点Q在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41d96e428931b19cf639d3e0f26ebe23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(3)当点P在线段
![](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/ba70863115b0947e98214a7b2512167d.png)
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【推荐1】已知
为
的直径,
为
上一点,
和过点
的切线互相垂直,垂足为
,
交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/25/3299a744-7f9d-46f2-9018-0f3f9d10a8b9.png?resizew=281)
(1)如图①,求证:
平分
;
(2)如图②,过
作
交
于点
,连接
,若
,
,求
和
半径的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/25/3299a744-7f9d-46f2-9018-0f3f9d10a8b9.png?resizew=281)
(1)如图①,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4189a0821a0ffab9dc171ecd279ba442.png)
(2)如图②,过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cac054e2d7025710736dfbd86706a7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d834587fa4842ded7bae4b126cc4060.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49437f474e5805688dff21ded2d1fd7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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【推荐2】如图1,AB为⊙O的直径,P为AB延长线上一点,点C在⊙O上,连接PC交⊙O于点D,OP=CP.
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992568708521984/2992666442194944/STEM/2793b1189bb64b8d938839a2e5bd4157.png?resizew=563)
(1)求证:∠ACP=3∠PAC;
(2)如图2,过点C作弦CE⊥AD,垂足为F,CE交AB于点G,求证:EC=AC;
(3)如图3,在(2)的条件下,过点G作GM⊥PC,垂足为M,若EG=4,MG=2
,求⊙O的半径.
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992568708521984/2992666442194944/STEM/2793b1189bb64b8d938839a2e5bd4157.png?resizew=563)
(1)求证:∠ACP=3∠PAC;
(2)如图2,过点C作弦CE⊥AD,垂足为F,CE交AB于点G,求证:EC=AC;
(3)如图3,在(2)的条件下,过点G作GM⊥PC,垂足为M,若EG=4,MG=2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
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【推荐1】设点P在矩形ABCD内部,当点P到矩形的一条边的两个端点距离相等时,称点P为该边的“中轴点”.例如:若点P在矩形ABCD内部,且PA=PD,则称P为边AD的“中轴点”.已知点P是矩形ABCD边AD的“中轴点”,且AB=10,BC=8,如图1.
![](https://img.xkw.com/dksih/QBM/2022/4/19/2961766152486912/2964290554765312/STEM/34324246090f4138bf6652739abbe8f2.png?resizew=551)
(1)求证:P是矩形ABCD边BC的“中轴点”;
(2)如图2,连接PA,PB,若△PAB是直角三角形,求PA的值;
(3)如图3,连接PA,PB,PD,求tan∠PDC·tan∠PBA的最小值.
![](https://img.xkw.com/dksih/QBM/2022/4/19/2961766152486912/2964290554765312/STEM/34324246090f4138bf6652739abbe8f2.png?resizew=551)
(1)求证:P是矩形ABCD边BC的“中轴点”;
(2)如图2,连接PA,PB,若△PAB是直角三角形,求PA的值;
(3)如图3,连接PA,PB,PD,求tan∠PDC·tan∠PBA的最小值.
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【推荐2】如图,在
中,
.点
在边
上,
,以
为圆心,
为半径的弧经过点
.
是弧
上的一个动点.
(1)求线段
的长;
(2)若
是弧
的中点,连接
,求
的正切值;
(3)若
平分
,延长
交
的延长线于点
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a2a47ffc515b3bb0e194789de2626c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/140c079ca633c7e2759b1216f2863ce0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(1)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829a1a887ceba13dd8551b1e3604bf6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404fc19da3e4da41e9147e9f0ca64957.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404fc19da3e4da41e9147e9f0ca64957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://img.xkw.com/dksih/QBM/2021/1/23/2642420755185664/2669722411098112/STEM/24539551-dc09-48db-886d-9c2bdd9d15e2.png)
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【推荐1】如图1,⊙O的半径为r,AC和BD是⊙O的两条弦,且AC⊥BD.
(1)若r=4,
的长度为3π,求∠ABD的度数;
(2)如图2,若AC是⊙O的直径,E是
上一点,连接BE和DE,CF⊥DE于点F,若DE=10,BE=4,求DF的长.
(1)若r=4,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
(2)如图2,若AC是⊙O的直径,E是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
![](https://img.xkw.com/dksih/QBM/2021/9/11/2805686856335360/2806017360805888/STEM/1cad7366-0501-4c1e-858b-c76f9bf29951.png)
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【推荐2】
内接
,
于D,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/2/693f6019-91a1-4b6d-ab92-3fc73bf3c03d.png?resizew=436)
图1 图2 图3
(1)如图1,求证:
;
(2)如图2,作
交
的延长线于E,交
于F,延长
交
于G,连接
,求证:
;
(3)在(2)的条件下,如图3,
交
于点T,
,
,
,求
长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/2/693f6019-91a1-4b6d-ab92-3fc73bf3c03d.png?resizew=436)
图1 图2 图3
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3fb1f7775325f374315617e243cf57.png)
(2)如图2,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d320f180419175d75eebc618cc458b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f007fcc7f6c091ea9e263c709b5b89c.png)
(3)在(2)的条件下,如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef1116f6f0f6fad58008bcf43d4de791.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa55f2da11b37dfc87f172ffb1ecaade.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9620e97567191461f1a87aebb7b4f69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd90d761e5a98f6195252bb41dcf9be.png)
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