在
中,
,
,
为
边上一点,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/22/afe47170-8906-4361-a45f-3c003ae56e84.png?resizew=495)
(1)如图1,若
,
,求
的长;
(2)如图2,将
的边
绕点
在同一平面内顺时针旋转
得到
,
为
延长线上一点,连接
.若
,求证:
;
(3)如图3,在(1)的条件下,
为射线
上一动点,连接
,将
沿
翻折,得到
,连接
,
为
的中点,连接
,当
的长度最小时,请直接写出
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/ed10df4140819d5451773a45de66201b.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://img.xkw.com/dksih/QBM/editorImg/2024/3/22/afe47170-8906-4361-a45f-3c003ae56e84.png?resizew=495)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d65639672f444b3d4dc6fc4f357ddbd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)如图2,将
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80651f797ab9dccfd7163c605b091ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90edd2795bb26a26c82f92126a443e5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12143a06ed24558d8cc7ad39961d3e1f.png)
(3)如图3,在(1)的条件下,
![](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/5b3a146d175eb45269e4e5c499b9a8f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e59b7c0d4a0b312e674b7bb061240b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bba5104efd1330bd49bed3648c3ec7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b123ae31090740589ba27a846620b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b123ae31090740589ba27a846620b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/464c24c1b5c93ac4bc6752fa1f8e4f9e.png)
23-24九年级上·全国·期末 查看更多[1]
(已下线)猜想04与圆相关的几何综合(6种模型)-2023-2024学年九年级数学上学期期末考点大串讲(人教版)
更新时间:2024-01-21 21:12:30
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相似题推荐
解答题-问答题
|
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(0.4)
【推荐1】如图1,
、
在直线l的同侧,
在
的左边,
,
,
,连接
、
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/07b416e5-4b0e-4112-aeff-a8ed10584209.png?resizew=419)
(1)
是 三角形:
(2)如图2,以
为一边向外作等边
,当边
与
重合时,直接写出
与
的数量关系 ;
(3)如图3,当等边
的边
,且
时,求
的长.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae781496bb5bc79b67abced9aa3cd0c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87320eb4a1c31ad4ffc15ccb2855a6cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12143a06ed24558d8cc7ad39961d3e1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/07b416e5-4b0e-4112-aeff-a8ed10584209.png?resizew=419)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)如图2,以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(3)如图3,当等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/684d328b02462aa25a936d1c83eee4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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名校
【推荐2】已知△ABC是等边三角形,△ADE的顶点D在边BC上
(1)如图1,若AD=DE,∠AED=60°,求∠ACE的度数;
(2)如图2,若点D为BC的中点,AE=AC,∠EAC=90°,连CE,求证:CE=2BF;
(3)如图3,若点D为BC的一动点,∠AED=90°,∠ADE=30°,已知△ABC的面积为4
,当点D在BC上运动时,△ABE的面积是否发生变化?若不变,请求出其面积;若变化请说明理由.
(1)如图1,若AD=DE,∠AED=60°,求∠ACE的度数;
(2)如图2,若点D为BC的中点,AE=AC,∠EAC=90°,连CE,求证:CE=2BF;
(3)如图3,若点D为BC的一动点,∠AED=90°,∠ADE=30°,已知△ABC的面积为4
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/2021/9/26/2816433435254784/2821985199603712/STEM/9581b68d-8c03-4f8d-b6ad-76839e740cc5.png)
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解题方法
【推荐1】如图,在正方形ABCD中,点E在边BC上(不与端点重合),
是由
绕点A顺时针旋转
得到的,连接EF交AD于点G,过点A作
,垂足为H,连接BH.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/25/1eec081a-1129-43f7-9bf0-cf78da2397b2.png?resizew=169)
(1)求证:
是等腰直角三角形;
(2)求证:
;
(3)若
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441dec590b47adc3678a291a3ec89a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/196d516e71f2d5a5362c57952e36a29d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/25/1eec081a-1129-43f7-9bf0-cf78da2397b2.png?resizew=169)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d43af5a1c59dfeb9819827b19f72db1.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c26f630b4d8bf2fb7654846c4f9967.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e176b0a4726d875e42702b41909f7f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb672cd9b920179de185fb959f76ff6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0779d75d6fc5e5c43902d7a2894fbfe7.png)
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【推荐2】如图甲所示,在平面直角坐标系中,抛物线
与
轴交于
,
两点,与
轴交于点
,点
为该抛物线的顶点.
(1)如图甲,点
为抛物线上
,
两点间的一动点,连接
,
,当
面积最大时,在对称轴上有一动点
,如图乙所示,过点
作
轴交
轴于点
,连接
,
,求
的最小值,并求出此时点
的坐标;
(2)如图丙所示,将
绕着点
旋转,得到
,在旋转过程中,是否存在某个时刻使以点
为顶点的三角形为以
为腰的等腰三角形,如果存在,请直接写出此时点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1c66a1649a61eda2dc4f2a19a3b46ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(1)如图甲,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983add910c8e09954f164a5e87d1f7fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d86f6605038c0c9a5d1196adbf6d13ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc67343c9a2fe7a0abe9645f96beed1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(2)如图丙所示,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad4401c953760ed8fe55a4d5f5df89d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9fb506303b3eda4b7880a8155abd80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46daef7a7fb6fa17263e8f0627fb4636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d7ffb7889a31b267a85f1ea238138e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/26/350360b2-12cd-4a90-86bc-b466f3f55881.png?resizew=572)
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【推荐1】如图,点
是等边
内一点,
.将
绕点
按顺时针方向旋转
得
,连接
.
![](https://img.xkw.com/dksih/QBM/2023/2/24/3181809305526272/3184014107926528/STEM/3e8be4805ebe403b963ee09f678a5fbd.png?resizew=191)
(1)当
时,通过上述旋转可得到三条线段
、
、
之间的等量关系,请写出这个等量关系,并说明理由;
(2)探究:当
为多少度时,
是等腰三角形?(只填出探究结果即可)
= .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc16b7796cac8eb8c15183f5312eb4c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7ffcd1925a2b1259221c6a476152f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://img.xkw.com/dksih/QBM/2023/2/24/3181809305526272/3184014107926528/STEM/3e8be4805ebe403b963ee09f678a5fbd.png?resizew=191)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5c1c29196e61a52b63d9d6cd8184256.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
(2)探究:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/372629a8666de1e9bac3e7daadcac7b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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【推荐2】如图①,抛物线
,与x轴交于A,B两点(A在B的左边),与y轴交于C点,顶点为E,其中,点A坐标为
,对称轴为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/a28a136b-148e-49cf-b6d7-8a0249837940.png?resizew=340)
(1)求此抛物线解析式;
(2)在第四象限的抛物线上找一点F,使
,求点F的坐标;
(3)如图②,点P是x轴上一点,点E与点H关于点P成中心对称,点B与点Q关于点P成中心对称,当以点Q,H,E为顶点三角形是直角三角形时,求P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14573ee8b4d73b9cf4080f6a03ce8d84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6554ac3dff4a59833e407db887f6e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/a28a136b-148e-49cf-b6d7-8a0249837940.png?resizew=340)
(1)求此抛物线解析式;
(2)在第四象限的抛物线上找一点F,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342a8dda4ec8409ee36bbb4455e3b832.png)
(3)如图②,点P是x轴上一点,点E与点H关于点P成中心对称,点B与点Q关于点P成中心对称,当以点Q,H,E为顶点三角形是直角三角形时,求P的坐标.
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解答题-问答题
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【推荐1】【问题情景】
中,点E是线段
上一点(不与B,C点重合),连接
.将
绕点E顺时针旋转
得到
,连接
,求
的度数.
以下是两名同学通过不同的方法构造全等三角形来解决问题的思路:
小聪:过点
作
的延长线的垂线;小明:在
上截取
,使得
;
请你选择其中一名 同学的解题思路,写出完整的解答过程.
【类比探究】
(2)如图2,点E是菱形
边
上一点(不与B,C点重合),
,将
绕点E顺时针旋转
得到
,使得
,(
).
①求
的度数(用含
的代数式表示);
【学以致用】
②如图3,连接AF与CD相交于点G,当
时,若
,
,则BE的长为_____.
![](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/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6fc8bfdbf2a7e4ab5ef262b20611785.png)
以下是两名同学通过不同的方法构造全等三角形来解决问题的思路:
小聪:过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c7f8da1f66714eba7f2867a19d02479.png)
请你选择其中
【类比探究】
(2)如图2,点E是菱形
![](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/597ce705d3a2fe04d29de9e81ec6250d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce468e13528f3406d7ebb42cb7dae37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02cb0e46b861ad2cc17e7cb67416980.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6fc8bfdbf2a7e4ab5ef262b20611785.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
【学以致用】
②如图3,连接AF与CD相交于点G,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d03f73bec20b60bc7608972607f5a9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e691e76614be733eee2f2845b298847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6f6c04bc017ced739230d14ba31948.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
解题方法
【推荐2】如图,
, 点
分别在线段
上,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d70bd26463dad4a68f15bf3fce67609.png)
求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8517aa0e182ebce399e113d03f9cc5c3.png)
已知
分别是
的中点,连结![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3ae8107d3e5b5707439f123b117b816.png)
①若
,求
的度数:
②连结
当
的长为何值时,四边形
是矩形?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a47d00d6498d2a65d281f328c2f06be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a519ebe66b2f24f42d6e0a203b044f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d70bd26463dad4a68f15bf3fce67609.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8517aa0e182ebce399e113d03f9cc5c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fa5b37d15b185d61422627fe9b747ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/692c58a2af64d705cd4a988ed2bfbc3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3ae8107d3e5b5707439f123b117b816.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e40952b3d39a4dd166e60caf5c882c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
②连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/112d2f6b62e1ec49d04c642b5aad70d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/5bc0d6e0-f4b9-4870-b406-3087f421c05d.png?resizew=242)
您最近一年使用:0次