实践与探究:
操作一:已知边长为8正方形纸片ABCD,将正方形纸片ABCD对折,使得点A和点D重合,点B和点C重合,折痕为EF.
操作二:如图①,将正方形纸片ABCD沿过点B的直线翻折,点A的对应点为点N,折痕为BM.当N落在EF上时,BF和BN的数量关系是______;
的大小为______.
操作三:如图②,再将纸片沿直线BN翻折,点M的对应点为点
.当点
在CD上时,求
的度数.
操作四:如图③,当点M沿
运动时,EN中点为K,连接DK,DK的最小值为______.
操作一:已知边长为8正方形纸片ABCD,将正方形纸片ABCD对折,使得点A和点D重合,点B和点C重合,折痕为EF.
操作二:如图①,将正方形纸片ABCD沿过点B的直线翻折,点A的对应点为点N,折痕为BM.当N落在EF上时,BF和BN的数量关系是______;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa6e63383249964f25eef817d1cfb58e.png)
操作三:如图②,再将纸片沿直线BN翻折,点M的对应点为点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da895d8bd043625a0839128252130d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da895d8bd043625a0839128252130d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d76e136e7df3692ae6536fc70b6961a9.png)
操作四:如图③,当点M沿
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fcc497b16c43b39596b64d77c969771.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/c3ee33b9-3007-4141-8e7a-67d7c2e75a7a.png?resizew=480)
更新时间:2022-09-19 11:13:58
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图1,在
中,
,
是等腰三角形且
,
,以
为顶点作
,交边
于
两点,延长
到点
,使得
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/14/9f532bb7-f085-43be-8e06-1a9773b5d630.png?resizew=267)
(1)试说明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
;
(2)如图2,若点
是
的延长线的一点,
是
的延长线上的点,点
在线段
上,其他条件不变,探究线段
,
,
之间的关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db14714995d404fc3cc36b5d5c24def1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a9ec45721f7b4d1c99917ac0d970f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532aece6cfd67e2a97977eed978dbf2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bcf905f3910d9238a44ef647835b3d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9149c116c750a53b286e543391503fba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d54431bbb28ebd98db5c1dc6083a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec42f093ae13224f227269325dd2cc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb68a3467d173ac6a3c8a35b8e7c15bf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/14/9f532bb7-f085-43be-8e06-1a9773b5d630.png?resizew=267)
(1)试说明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6234a70e91c35b5d83dddc56ff06b0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33445de8ee600a367d42da19e7c5e2f4.png)
(2)如图2,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dafebaaf13781120dc57c277d0267c0.png)
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解答题-证明题
|
较难
(0.4)
【推荐2】如图,
≌
,
,
,
,连接
.
![](https://img.xkw.com/dksih/QBM/2022/12/31/3142836540694528/3144716261326848/STEM/ab4c5626632347b8bd38323e8cfbd792.png?resizew=252)
(1)求证:
是等边三角形;
(2)直接写出当
为多少度时,
是等腰三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7ffcd1925a2b1259221c6a476152f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/950a96f120b449d9cf5c1709867c3d2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcbec8352ce3dbfbf3b173045d0ba8f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://img.xkw.com/dksih/QBM/2022/12/31/3142836540694528/3144716261326848/STEM/ab4c5626632347b8bd38323e8cfbd792.png?resizew=252)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4807ca16360c0cca436e59d4be98f626.png)
(2)直接写出当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/372629a8666de1e9bac3e7daadcac7b6.png)
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解答题-计算题
|
较难
(0.4)
名校
【推荐3】(1)观察理解:如图 1,
中,
,直线
过点
,点
在直线
同侧,
,垂足分别为
,由此可得:
,所 以
, 又 因为
, 所以
,所以
,又因为
,所以
( );(请填写全等判定的方法)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/16/e983f1ee-6a30-4cab-97a8-6e2a48ab46ae.png?resizew=214)
(2)理解应用:如图2,
,且
,且
,利用(1)中的结论,请按照图中所标的数据计算图中实线所围成的图形的面积
_________;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/16/a938dc49-b386-4591-8920-b38269db6d74.png?resizew=198)
(3)类比探究:如图 3,
中,
,
,将斜边
绕点
逆时针旋转 90至
,连接
,则
的面积=_________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/16/1b79887a-bd48-4b41-ac31-94275aa20b4c.png?resizew=126)
(4)拓展提升:如图4,等边
中,
cm,点
在
上,且
cm,动点
从点
沿射线
以1cm/s速度运动,连接
,将线段
绕点
逆时针旋转 120°得到线段
,设点
运动的时间为
秒.
①当
________秒时,OF∥ED;
②当
________秒时,点
恰好落在射线
上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7f97bf47387beb9f9fd0253b8a21234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bac945e24624147139229bd78cda736d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ae8a71207cf04f3f004184be0d39f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2b6f11b74b1cb04d9ed8fe485687e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dfc52a6655c83c8c7eb081bd0f26e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83e72d812fdaca589976ea299cc7468.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11c7506a5d7a40d521d44861851b2ffc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/16/e983f1ee-6a30-4cab-97a8-6e2a48ab46ae.png?resizew=214)
(2)理解应用:如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e5b4ea605cf0b98e428d071f6be6762.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc434c20637529a4237d68104137260c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/16/a938dc49-b386-4591-8920-b38269db6d74.png?resizew=198)
(3)类比探究:如图 3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefc12c61c95d8e36846a6aac1c9105b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943712a5e96b16cc15d775cc4687237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/020ebe1219437129358b986eb9e70bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5200e6898e7662502286191553dacfe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/16/1b79887a-bd48-4b41-ac31-94275aa20b4c.png?resizew=126)
(4)拓展提升:如图4,等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebf0129d86a64b4509cea80c24ae65b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/322ede371576df906bb29e63ccd8ca6f.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/85bdcc2742be52cc80ba7dbe79f9a574.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/16/19d577d0-0b9a-4b53-aeba-7f0de782237e.png?resizew=504)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】在平面直角坐标系中,点B的坐标为
,点A为y轴正半轴上的一个动点,
(1)如图①,若
,点A的坐标为
点纵坐标为6,求证:
.
(2)如图②,在(1)的条件下,以A为直角顶点,
为直角边在第二象限作等腰直角
,连接
交y轴于点P,求线段
的长度.
(3)如图③,若
,在点A处有一个等腰直角三角形
绕点A旋转,且
,连接
,点G为
中点,试猜想线段
与线段
的关系,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1283bc4ee6f5900af146db00abba00fd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/18/9647b599-31fa-481e-a52e-734a24c85b42.png?resizew=463)
(1)如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1573529fc4bf08b9e38329c676577e82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
(2)如图②,在(1)的条件下,以A为直角顶点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e55b85a1dc91ee8a026ad44e82d42b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
(3)如图③,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fca3734de79f7f50b552ef62b29dc7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1de7da3ab92e70f135ea628a691167.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b187365a5fee1d698b725ece7e969a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4505508b3e36db64a207dcdaf8eb22dc.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】已知,如图,在
中,
.D是
上一点,
,且
,点F 在
的延长线上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/11/ea9cdac6-8ae0-456a-a9e5-d211bf162b66.png?resizew=189)
(1)求证:
;
(2)当
时,求
;
(3)试探究
与
的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f135ae4531e59a3c5a7c1e475a5e8934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c697facf30880c77a16233cb9938b516.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bc53b7f2b69c4e3b7d23c10a51c9bf2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/11/ea9cdac6-8ae0-456a-a9e5-d211bf162b66.png?resizew=189)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eb13c1026f1c19f7623ae92a701405b.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3909f220cf6bd065e382e263b77aa22.png)
(3)试探究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图,正方形
中,
,点E在边
上,且
.将
沿
对折至
,延长
交边
于点G,连接
、
.
![](https://img.xkw.com/dksih/QBM/2022/12/9/3127147158355968/3141433863864320/STEM/ede820537f364a199eed7fb43c6b78b2.png?resizew=129)
(1)求证:
;
(2)说明
;
(3)求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e7920c260a4793cb02b78dabe2d817d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca2698f08d94afa1cd5b81444791f4c7.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/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/2022/12/9/3127147158355968/3141433863864320/STEM/ede820537f364a199eed7fb43c6b78b2.png?resizew=129)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0e2233a5e812e006e037a1533d5dc8c.png)
(2)说明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7768040703191e6fed9e6198d3e8a22.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ffab24578093dee05cc834c02a8023.png)
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【推荐2】【问题情境】
综合与实践课上,老师发给每位同学一张正方形纸片
.在老师的引导下,同学们在边
上取中点
,取
边上任意一点F(不与
重合),连接
,将
沿
折叠,点
的对应点为
.然后将纸片展平,连接
并延长交
所在的直线于点
,连接
.探究点
在位置改变过程中出现的特殊数量关系或位置关系.
(1)如图1,小亮发现:
.请证明小亮发现的结论.
(2)如图2、图3,小莹发现:连接
并延长交
所在的直线于点
,交
于点
,线段
与
之间存在特殊关系.请写出小莹发现的特殊关系,并从图2、图3中选择一种情况进行证明.
【应用拓展】
(3)在图2、图3的基础上,小博士进一步思考发现:将
所在直线与
所在直线的交点记为
,若给出
和
的长,则可以求出
的长.
综合与实践课上,老师发给每位同学一张正方形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98d0b8ce4b69734c853141afd377e720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(1)如图1,小亮发现:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ea8d1c19968e2329b21f04a502f7324.png)
(2)如图2、图3,小莹发现:连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
【应用拓展】
(3)在图2、图3的基础上,小博士进一步思考发现:将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
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名校
【推荐1】在平面直角坐标系
中,对于两个点
,
和图形
,如果在图形
上存在点
,
(
,
可以重合)使得
,那么称点
与点
是图形
的“一对平衡点”.如图1,已知点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/18/411be7fd-b295-4495-96da-dcdd363083f9.png?resizew=473)
(1)设点
与线段
上一点的距离为
,则
的最小值是______,最大值是______;
(2)在
,
,
这三个点中,与点
是线段
的“一对平衡点”的是______;
(3)如图2,已知
的半径为1,点
的坐标为
.若点
在第一象限,且点
与点
是
的“一对平衡点”,求
的取值范围;
(4)如图3,已知点
,以点
为圆心,
长为半径画弧,交
轴的正半轴于点
.点
(其中
是坐标平面内一个动点,且
,
是以点
为圆心,半径为2的圆,若
上的任意两个点都是
的“一对平衡点”,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa60af8a0b0a4c748e50f8b677677183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22bffeb656a376069508b0b51b249c96.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/18/411be7fd-b295-4495-96da-dcdd363083f9.png?resizew=473)
(1)设点
![](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/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb7542797821b197cbc64d720d1cc7c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca17ce097cb416ed64a3e18b358957b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03481fede2a123a58db11bbb863548de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)如图2,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b569572c8d9bf05d78d3ab741e68bb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812367a7a669dd720d2f1628e2fdb019.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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(4)如图3,已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d25339f9fb760f79096c085b3ee38f23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4cd68cc82e90a5e2049a7ea3171b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad0f00d7f0acc53d9774923580a60bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/406bd648374e4347c3ea29f004087ee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f42f56b246c0eecf454c6ca8f956fb04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669e8dfb2b45e6f74d86408343a18fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c38d239445fb31536dc29e518a7d0e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669e8dfb2b45e6f74d86408343a18fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/18/38739e04-e48e-4245-a4d6-2675aa0f83e6.png?resizew=241)
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解答题-问答题
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较难
(0.4)
【推荐2】如图,在平面直角坐标系中,点C是以点
为圆心,1个单位长度为半径的圆上一点,点B的坐标为
,连接
,D是
的中点,连接
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6d9a25d20b86c2583f6c071091e8e3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb442fb1fe1a5d9768cf11c3e1b7ec5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
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解答题-计算题
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【推荐3】数学兴趣小组探究平面内横、纵坐标满足特定关系的动点的运动轨迹问题:
(1)组长提出问题:动点
随着t的变化形成的运动轨迹是什么?
甲同学的思考:t取3个特殊值得到3个点坐标,发现3点在一条直线上,可以利用待定系数法求出该直线的表达式;乙同学的思考:令
,
,通过消去t得到y与x的函数关系式.
______(填甲或乙)同学的方法更严谨,点
运动轨迹的函数表达式为______;
(2)如图,在平面直角坐标系中,已知点
,
,Q为坐标系内一点且
,点M从点A出发以每秒8个单位的速度沿x轴向左运动,同时点N从点O出发以每秒6个单位的速度沿y轴向上运动,点P是MN的中点,设运动时间为t.求点P的运动轨迹的函数表达式,并计算当
时PQ的最小值;
![](https://img.xkw.com/dksih/QBM/2023/5/27/3246866763276288/3248733433135104/STEM/787f5309da5b4fe896c1ac909f1660b0.png?resizew=163)
(3)老师给出坐标平面内两个动点:
,
.
丙学说:点T、K的运动轨迹都是直线;丁同学说:点T、K在运动过程中不可能重合;请你判断两人结论是否正确并说明理由.
(1)组长提出问题:动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8c1a983a410c080727fd1d4d1541d4.png)
甲同学的思考:t取3个特殊值得到3个点坐标,发现3点在一条直线上,可以利用待定系数法求出该直线的表达式;乙同学的思考:令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac1aa0dc7af14bac3389c2d635bee30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c517b5fcd79e6a89c955e3e1b33cddd.png)
______(填甲或乙)同学的方法更严谨,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8c1a983a410c080727fd1d4d1541d4.png)
(2)如图,在平面直角坐标系中,已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e8fd1ce0df99890a2147191d6fe8961.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25ce8d4a9d432afe03a988ae2d49c28c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4285ae8617bd752bfc059caf65e4c1d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbeede118c407a800b05757b9a1393e.png)
![](https://img.xkw.com/dksih/QBM/2023/5/27/3246866763276288/3248733433135104/STEM/787f5309da5b4fe896c1ac909f1660b0.png?resizew=163)
(3)老师给出坐标平面内两个动点:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3435e109dbfc8cbd368b7af47f3b66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/519c8e14a1c18b34341a49120a7e3423.png)
丙学说:点T、K的运动轨迹都是直线;丁同学说:点T、K在运动过程中不可能重合;请你判断两人结论是否正确并说明理由.
您最近一年使用:0次