在等腰
和等腰
中,
,
.将
绕点
逆时针旋转,连接
.点
为线段
的中点,连接
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90c780dac29ff8b7df5881d3b33abab.png)
旋转到
边上时,线段
与
的数量和位置关系是 .
(2)如图2,当点
旋转到
边上时,(1)中的结论是否成立?若成立,写出证明过程,若不成立,请说明理由
(3)若
,
,在
绕点
逆时针旋转的过程中,当
时,求线段
的长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2657e02314469ad2b13d31dce41b4343.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5713dd389cedc7caf41a9664ba07e194.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88cfb3c704a4d382d05c5cc5bda9dc1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2657e02314469ad2b13d31dce41b4343.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90c780dac29ff8b7df5881d3b33abab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90c780dac29ff8b7df5881d3b33abab.png)
(2)如图2,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18834f4ba51bf4d490f35ed02379fec7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2657e02314469ad2b13d31dce41b4343.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
20-21八年级下·四川成都·期中 查看更多[3]
四川省成都市双流区双流区棠湖中学实验学校2020-2021学年八年级下学期期中数学试题(已下线)专题强化 平移和旋转变换技巧考点的综合-2022-2023学年八年级数学下册《考点·题型·技巧》精讲与精练高分突破系列(北师大版)2023年内蒙古北方重工业集团有限公司第一中学中考模拟数学模拟预测题
更新时间:2023-01-19 16:40:20
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】如图1,在平面直角坐标系中,点
点
为
轴上两点,点
在
轴的正半轴上,且
,
满足等式
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/28/d15e5621-4788-48ba-a7fe-4f6301d22c37.png?resizew=447)
(1)判断
的形状并说明理由;
(2)如图2,
,
是
上的点,且
,延长
交
于
,连接
,判断
与
的位置关系,并证明你的结论.
(3)如图3,若点
为线段
上的动点(不与
,
重合),过点
作
于
,点
为线段
上一点,且
,
为
的中点,连接
,
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3160fc73f2a90ae4a1a97351ab2673b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3dd1ffa1d71ff9b4165ab7569a4ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f8a990062fc3f4b899147452f46fbe4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/28/d15e5621-4788-48ba-a7fe-4f6301d22c37.png?resizew=447)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)如图2,
![](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/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29acf2e72efffef3c6297b355fdae34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
(3)如图3,若点
![](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/7f9e8449aad35c5d840a3395ea86df6d.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/32c38dfd14dde969702dff97ef2270f9.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b6ca4c6f3c1c447085a27fed51dfd12.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/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833b91f5c572c8be0ebc9ac33a2461b0.png)
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【推荐2】已知:△ABC和△ADE都是等腰直角三角形,∠ACB=∠ADE=90°,点M是BE的中点,连接CM、DM.
(1)当点D在AB上,点E在AC上时(如图一),求证:DM=CM,DM⊥CM;
(2)当点D在CA延长线上时(如图二)(1)中结论仍然成立,请补全图形(不用证明);
(3)当ED∥AB时(如图三),上述结论仍然成立,请加以证明.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/77bbdc5a-24df-4934-a445-eedd45a8e074.png?resizew=351)
(1)当点D在AB上,点E在AC上时(如图一),求证:DM=CM,DM⊥CM;
(2)当点D在CA延长线上时(如图二)(1)中结论仍然成立,请补全图形(不用证明);
(3)当ED∥AB时(如图三),上述结论仍然成立,请加以证明.
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解答题-证明题
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较难
(0.4)
【推荐1】四边形
中
,
.
(1)求证:四边形
是平行四边形;
(2)
是
上一点,连接
,
在
上,连接
、
,
,
,求证:
;
(3)在(2)的条件下,若
,
,
.求线段
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eb34d917a073024625616e4edf22016.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/7/eb980ead-7d89-4be0-8b20-28c1babbbd02.png?resizew=475)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb1150e7caf86393601b45976f94f3e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afde2677f7036a0afc1a13cf4a0865e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/136cf1fd63b17f23db6fd10c91a29288.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db65ce4f5eee5afd12ba37bef3fac57b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f341b98caabf99bc683ce8407068735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc39144b305c67d44410d41053a1d28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
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解答题-证明题
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【推荐2】如图,在矩形ABCD中,点E是BC边上一点,且AD=DE,以AB为半径作⊙A,交AD边于点F,连接EF.
![](https://img.xkw.com/dksih/QBM/2022/5/9/2975803288281088/2976484338663424/STEM/89e162e3-f4fd-4f06-aa78-956eaf39c5fe.png?resizew=229)
(1)求证:DE是⊙A的切线;
(2)若AB=2,BE=1,求AD的长;
(3)在(2)的条件下,求tan∠FED.
![](https://img.xkw.com/dksih/QBM/2022/5/9/2975803288281088/2976484338663424/STEM/89e162e3-f4fd-4f06-aa78-956eaf39c5fe.png?resizew=229)
(1)求证:DE是⊙A的切线;
(2)若AB=2,BE=1,求AD的长;
(3)在(2)的条件下,求tan∠FED.
您最近一年使用:0次
解答题-证明题
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较难
(0.4)
名校
【推荐1】在菱形
中,
,
,动点M在射线
上运动.
,得到对应点
,连接
,
.求证:
;
(2)如图(2),在(1)条件下,若射线
经过
边中点E,求
的值;
(3)连接
,将线段
绕着点M逆时针旋转一个固定角α,
,点A落在点F处,射线
交射线
于G,若
是等腰三角形,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cdd5aafca6ffa00e05eab101031752b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c26ed4600cef25f040caa553ac21051.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a0387fc1258f31e44a10068c0ccfd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884b508394b3ab50734b584d9ec783c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854e1892c4df407beb990ceed492bdae.png)
(2)如图(2),在(1)条件下,若射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35ee685a6d4799b0ba7e114a3906c0c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f98d96882d2f6a76ceb019705c0ba224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/234cdeeee94033501fca6596894f7b4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
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名校
【推荐2】数学兴趣小组活动中,小明进行数学探究活动,将边长为
的正方形
与边长为
的正方形
按图1位置放置,
与
在同一条直线上,
与
在同一条直线上.
![](https://img.xkw.com/dksih/QBM/2021/10/14/2829158622904320/2830729805021184/STEM/d67bce3a-9f50-49fd-968c-14dd928dcee2.png?resizew=535)
(1)小明发现
,请你帮他说明理由.
(2)如图2,小明将正方形
绕点
逆时针旋转,当点
恰好落在线段
上时,请你帮他求出此时
的长.
(3)填空:
①在旋转过程中,如图3,连接
,
,
,
,则四边形
的面积最大值为__________.
②如图4,分别取
,
,
,
的中点
,
,
,
,连接
,
,
,
,则四边形
的形状为___________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://img.xkw.com/dksih/QBM/2021/10/14/2829158622904320/2830729805021184/STEM/d67bce3a-9f50-49fd-968c-14dd928dcee2.png?resizew=535)
(1)小明发现
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a987dd51f99d58c731c596c78dcd7e.png)
(2)如图2,小明将正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(3)填空:
①在旋转过程中,如图3,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e2ed201914eb640af2407d887a73b6a.png)
②如图4,分别取
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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