在
中,
,点
是
边上一点,连接
.
(1)如图1,若
,
,
,求
的长;
绕点
逆时针旋转一定的角度得到线段
, 且
,连接
,点
是平面内一点,连接
、
,且
,
,连接
交
于点
,
,若
,求证:
;
,
为
中点,
,将
沿
所在直线翻折至
所在的平面内得到
,在直线
上有两个动点
、
(点
在点
左侧),
为平面内另一动点,且
,当
取得最小值时,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/288c5312258f015e93ea06b303f121cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81ffa50f04646be42ff55e827f5c43b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac559a1a89bfb16e1c44cdd7ad2f2bbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bc0cc876a60c8cbdccc6a9a0b5b993.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30e6df4090a1108bf31b75aa82efc977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6ec64245bb5acc427b6051c8858ee6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e390298867719585cdbf1789147355b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ba89e83329983cfadbfcdda151aaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ba89e83329983cfadbfcdda151aaa3.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f86160657f7eecf7b0d1f86a5584dea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4381f631ff051a5d1abe5dbe8c7e54c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77526c5824b72fcdd90c27d9bfc97807.png)
更新时间:2024-04-06 18:26:24
|
相似题推荐
解答题-证明题
|
较难
(0.4)
解题方法
【推荐1】已知:如图1,△ABC中,∠ACB=90°,CD⊥AB于D,E为BC中点,CF⊥AE于F.
(1)求证:4CE2=BD•AB;
(2)若2∠DCF=∠ECF,求cos∠ECF的值;
(3)如图2,DF延长线交BC于G,若AC=BC,EG=1,则DG= .
(1)求证:4CE2=BD•AB;
(2)若2∠DCF=∠ECF,求cos∠ECF的值;
(3)如图2,DF延长线交BC于G,若AC=BC,EG=1,则DG= .
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/f7c78e01-20f1-4d53-8753-417d777454cc.png?resizew=309)
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名校
【推荐2】如图,在平面直角坐标系中,A(8,0),B(0,8),连接AB,点C为AB中点,连接OC.
(1)点C坐标为 ;
(2)如图2,动点E从A出发沿AO方向以每秒1个单位长度的速度向终点O运动,设点E的运动时间为t秒,连接CE,过点C作CE的垂线交OB于点F,设三角形OCF的面积为S,请用含t的式子表示S,并写出t的取值范围.
(3)在(2)的条件下,当t>4时,将△ACE沿CE折叠△A′CE,A′E交y轴于点G,求△GOE的周长.
(1)点C坐标为 ;
(2)如图2,动点E从A出发沿AO方向以每秒1个单位长度的速度向终点O运动,设点E的运动时间为t秒,连接CE,过点C作CE的垂线交OB于点F,设三角形OCF的面积为S,请用含t的式子表示S,并写出t的取值范围.
(3)在(2)的条件下,当t>4时,将△ACE沿CE折叠△A′CE,A′E交y轴于点G,求△GOE的周长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/ba2e48b4-8968-45fe-b1fa-fb1ab8dac6ec.png?resizew=462)
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【推荐3】如图,四边形ABCD是菱形,其中
,点E在对角线AC上,点F在射线CB上运动,连接EF,作
,交DC延长线于点G.
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899406760058880/2901299397238784/STEM/23e7a30b-ebd9-48e3-95a8-48fb1ad56a6c.png?resizew=379)
(1)试判断
的形状,并说明理由;
(2)图中
,
.
①当
时,以点B为原点,射线BC为正半轴建立平面直角坐标系.平面内是否存在一点M,使得以点M、E、F、G为顶点的四边形与菱形ABCD相似?若存在,求出点M的坐标,若不存在,说明理由;
②记点F关于直线AB的轴对称点为点N.若点N落在
的内部(不含边界),求CF的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32436704a722d5e568ff5c175bf3c662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e6ef4354cf6337fad1b719ff2bf8b7.png)
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899406760058880/2901299397238784/STEM/23e7a30b-ebd9-48e3-95a8-48fb1ad56a6c.png?resizew=379)
(1)试判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
(2)图中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e0c5cb53fd85b7a23f0580df6bb49a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b0b68a671bb4d5ff1d5c0cbcf86df55.png)
②记点F关于直线AB的轴对称点为点N.若点N落在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/836ea820cf3732508cdd332ceb9395ce.png)
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解答题-问答题
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较难
(0.4)
【推荐1】已知
,点P是平面内任意一点(不与点A,B,C重合),若点P与A,B,C中的某两点的连线的夹角为直角,则称点P为
的一个“勾股点”.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/21/beac0a27-6b6c-4a4e-8751-3c87897ee570.png?resizew=451)
(1)如图(1),若点P是
内一点,
,
,
,试说明点P是
的一个“勾股点”;
(2)如图(2),已知点D是
的一个“勾股点”,
,且
,若
,
,求
的长;
(3)如图(3),在
中,
,
,点D为
外一点,
,
,
,点D能否是
的“勾股点”,若能,求出
的长;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/21/beac0a27-6b6c-4a4e-8751-3c87897ee570.png?resizew=451)
(1)如图(1),若点P是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49d6286a4689ba0c3b3bdd9358855266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c3b60307119fc9d41a232bd9a9643b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/816bbb32de4289f7a5b6b48a70edfe8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)如图(2),已知点D是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b213b0feac94a8242790df27d4192b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6f89d8e914bae284004f147728e1512.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)如图(3),在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cce0c870df81682378af79d321ccdcea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f2665526efab6fdd59a4fe1bfe4e39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/386c7de62e8f9a8161ebaefe6b4ec35e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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解答题-证明题
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较难
(0.4)
【推荐2】某数学兴趣小组在数学课外活动中,对多边形内两条互相垂直的线段做了如下探究:
【观察与猜想】
(1)如图
,在正方形
中,
,
分别是
,
上的两点,连接
,
,若
,则
的值为___________;
(2)如图
,在矩形
中,
,
,
是
上的一点,连接
,
,若
,则
的值为___________;
【类比探究】
(3)如图
,在四边形
中,
,
为
上一点,连接
,过
作
的垂线交
的延长线于
,交
的延长线于
,求证:
;
【拓展延伸】
(4)如图4,在
中,
,
,将
沿
翻折,
落在
处,得到
,
为线段
上一动点,连接
,作
,交
于
,垂足为
,连接
.若
,则
的最小值为___________.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/7/02edb622-fe81-42d1-90a0-63194ca299e5.png?resizew=322)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/7/f3eec350-a032-4e90-b223-bf29b61ab21d.png?resizew=404)
【观察与猜想】
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f87b02b744534ae1ed700d21fcceb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ada5e380d6b5b2066e34497e5f0baf0.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78c1e75eb744576c32eed3f9d20f9558.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.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/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a45b04cc3e5adaeff6f9e01e29032803.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8775dcf60ad143bc59a58b000f374c56.png)
【类比探究】
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41aba1711910c6f533cc94319104f4fd.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccb545c1a90c841d0d25070cf62b64e3.png)
【拓展延伸】
(4)如图4,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd25cf7e576e25b47aff794b96ad0241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44cbab64c34b6317ee4c68ba7f8d56c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73636989e83905f8800a865c2b608c43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f87b02b744534ae1ed700d21fcceb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10384aed1cfcf1f031768cb3e1ad94dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
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解答题-证明题
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解题方法
【推荐3】如图,已知O是坐标原点,点A的坐标是(5,0),点B是y轴正半轴上一动点,以OB,OA为边作矩形OBCA,点E,H分别在边BC和边OA上,将△BOE沿着OE对折,使点B落在OC上的F点处,将△ACH沿着CH对折,使点A落在OC上的G点处.
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957148690817024/2973471085469696/STEM/f6047be3-35d0-4497-8d6a-108df1a07228.png?resizew=572)
(1)求证:四边形OECH是平行四边形;
(2)当点B运动到使得点F,G重合时,求点B的坐标,并判断四边形OECH是什么四边形?说明理由;
(3)当点B运动到使得点F,G将对角线OC三等分时,直接 写出点B的坐标.
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957148690817024/2973471085469696/STEM/f6047be3-35d0-4497-8d6a-108df1a07228.png?resizew=572)
(1)求证:四边形OECH是平行四边形;
(2)当点B运动到使得点F,G重合时,求点B的坐标,并判断四边形OECH是什么四边形?说明理由;
(3)当点B运动到使得点F,G将对角线OC三等分时,
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【推荐1】如图,矩形
的对角线
、
相交于点0.过点
作
,交
的延长线于点
.
(1)求证:
;
(2)若
,求
的长.
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3aafd2e9983c478261f5d6cd8d5c027.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a2ab6940dca62be1f3b2b5f8531990.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4a729a70430b6bbfc9ce632ea6e12c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2018/6/10/1964019786186752/1966157134241792/STEM/2d94bbc11902474ebaf2dc53b035ea4a.png?resizew=155)
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解答题-证明题
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较难
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【推荐2】已知反比例函数y=
的图象经过点A(6,1).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/18/b2f11af6-fac7-4a4f-8490-42ea1a8fb17b.png?resizew=202)
(1)求该反比例函数的表达式;
(2)如图,在反比例函数y=
在第一象限的图象上点A的左侧取点C,过点A作x轴的垂线交x轴于点H,过点C作y轴的垂线CE,垂足为点E,交直线AH于点D.
①过点A、点C分别作y轴、x轴的垂线,两条垂线相交于点B,求证:O、B、D三点共线;
②若AC=2CO,求证:∠OCE=3∠CDO.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb3a62e46296c417261156b51ec6b4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/18/b2f11af6-fac7-4a4f-8490-42ea1a8fb17b.png?resizew=202)
(1)求该反比例函数的表达式;
(2)如图,在反比例函数y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb3a62e46296c417261156b51ec6b4.png)
①过点A、点C分别作y轴、x轴的垂线,两条垂线相交于点B,求证:O、B、D三点共线;
②若AC=2CO,求证:∠OCE=3∠CDO.
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名校
【推荐3】如图,在平面直角坐标系xOy中,等边
的边OB与x轴重合,顶点A(m,n)的坐标满足:
,P为AB上一点,
;动点M从点O出发,沿着O→A→B→O的方向以每秒3个单位长度的速度向着终点O运动,动点N从点B出发,沿B→P方向以每秒1个单位长度的速度向着终点P运动,且动点M、N同时出发,各自到达终点即停止运动.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/22/800c4f56-2a58-4378-8afb-722988007ae2.png?resizew=475)
(1)求A点的坐标;
(2)当MN截
所得的四边形的面积等于
时,求点M的运动时间t;
(3)若动点M、N在满足(2)的条件下静止不动,此时点C为坐标平面内任意一点,请问在线段OB上是否存在这样的点D,使得以M、N、C、D为顶点的四边形是矩形?若存在,请求出点D的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78e98f0d5f53eca99eb06d7e684654bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68ca854ef247afa000d108c95101b03a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/22/800c4f56-2a58-4378-8afb-722988007ae2.png?resizew=475)
(1)求A点的坐标;
(2)当MN截
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3249cd2b28346c1d545032becdbeaac0.png)
(3)若动点M、N在满足(2)的条件下静止不动,此时点C为坐标平面内任意一点,请问在线段OB上是否存在这样的点D,使得以M、N、C、D为顶点的四边形是矩形?若存在,请求出点D的坐标;若不存在,请说明理由.
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解答题-问答题
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较难
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【推荐1】如图,点
、
在
的图象上.已知
、
的横坐标分别为
、
,直线
与
轴交于点
,连接
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/31/33c1f537-4cf4-4063-9ca5-583d8394864c.png?resizew=230)
(1)求直线
的函数表达式;
(2)求
的面积;
(3)在
轴上找一点
,使
的值最小,求点
的坐标和
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e48f28aeccf369df5980ac787e9e313f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/31/33c1f537-4cf4-4063-9ca5-583d8394864c.png?resizew=230)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51a8d10345f567e0f2daf18529d42f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51a8d10345f567e0f2daf18529d42f0.png)
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解答题-作图题
|
较难
(0.4)
【推荐2】如图是由小正方形组成的
网格,每个小正方形的顶点叫做格点.点A、B、E、F都在格点上,小正方形的边长为1个单位长度,以格点O为原点建立平面直角坐标系,仅用无刻度的直尺在给定网格中完成画图(画图过程用虚线表示,画图结果用实线表示).
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/8800eb7c-2df7-44d5-84f8-8c9adfe23456.png?resizew=369)
(1)如图1,画出线段
绕点
逆时针旋转
后的图形
与
对应);
(2)如图1,点
是线段
上一点,在(1)中的线段
上找到一点
,使得
;
(3)如图1,线段
是由线段
绕点
顺时针旋转得到的
与
对应),请直接写出
的坐标________;
(4)如图2,点
为格点,点
是线段
上一点,在线段
上找到一点
,使得
最小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13a96e9c2e2a15130d1d56a1d0e16b72.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/8800eb7c-2df7-44d5-84f8-8c9adfe23456.png?resizew=369)
(1)如图1,画出线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe639eab78eafd2d40ea70aa5d3f21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b97ab234fabcb37fb2fbe3b17b62c06e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)如图1,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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0379a2a83e0b10c67e53dec1e7c52872.png)
(3)如图1,线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.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/9db7bd6f151534875f9602ca245c8f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(4)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.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/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd0d96ea1504b85ca5de5f192d5c54c7.png)
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