【模型建立】:如图1,在正方形中,E,F分别是边
上的点,且
,探究图中线段
之间的数量关系.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/26/da0fbe2d-8db6-46d4-8e07-bb09c9155875.png?resizew=292)
(1)小宋的探究思路如下:延长
到点G,使
,连接
,先证明
,再证明
.
之间的数量关系为______.若
,则
______.
【模型应用】:
(2)如图2,在矩形
中,
,点F为
中点,
,求
的长.
【拓展提升】:
(3)通过对图2的分析,小宋同学在深入思考后,他发现一个很有意思的结论,若
,且
,则
______.(用含a、b的代数式表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ced324a15510f9cf7518d8c277c6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/262a442e5ba7c92fa023c23e10f325f1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/26/da0fbe2d-8db6-46d4-8e07-bb09c9155875.png?resizew=292)
(1)小宋的探究思路如下:延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e9f8f8598ffafaf6168f64799c8b9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c2fb8930c467a932690953a620d1ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f0fe7fae423504e161500352c5ab68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1d2e7164972669878dacd336ba11ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3897067ebc1d5097fe0a0cba012c8a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f76e37d6e6b182896ccaaa187cfe07.png)
【模型应用】:
(2)如图2,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c17cbf4b0548ffbcd4104b941335689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/010e01d63a8c60052fdbf6078a704f5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
【拓展提升】:
(3)通过对图2的分析,小宋同学在深入思考后,他发现一个很有意思的结论,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5372d82a189451ee42a08e59f6bc984.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a01e4b8708c2e29de01ba21e72c47f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a937c3eb48c16b675d84836c3cb7fa4.png)
更新时间:2024-03-26 12:40:23
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图,在矩形
中,
,点
从点
出发向点
运动,运动到点
停止,同时,点
从点
出发向点
运动,运动到点
即停止,点
的速度都是每秒1个单位,连接
.设点
运动的时间为
秒
为何值时,四边形
是矩形;
(2)当
时,判断四边形
的形状,并说明理由;
(3)当
为何值时,
;
(4)整个运动当中,直接写出线段
扫过的面积是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631b5a76fbe4e117bd1005beb99b76e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1b15a4605fce993cb13aefbf40360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e235c33bdfc7335f75e00f9a463cf297.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1b15a4605fce993cb13aefbf40360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe83f1ae7e5f05d8bed6bf6f42db0e7d.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56bb615b68fdd6edfe77c246e81702a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9af2350fad62b04e28e710045b513c.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aad564239fcfe92cfba8fb6ba758af5.png)
(4)整个运动当中,直接写出线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
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【推荐2】如图1,
,
与
交于点E.
为等边三角形,则
,
,
的数量关系为________.
(2)如图2,若
,
,
,请写出
,
,
的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27e2c20d959ff812b6349efce365a996.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fa12efe16e6c4ef0ec08a078ecbb5a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d37b9bfc0e291952dc2004277fc3cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abb3c143721938422cde08e0690fac88.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56ee81929c987732fcb379802eeef7a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af6489ea93854a12f006fc0ef3f2d37d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fa12efe16e6c4ef0ec08a078ecbb5a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d37b9bfc0e291952dc2004277fc3cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abb3c143721938422cde08e0690fac88.png)
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【推荐1】在正方形
中, 将
绕点 B 顺时针旋转(旋转角小于
) 得到
, 点A与点E对应, 点 D 与点 F对应, 连接
,
.
;
(2)如图2, 点O是
的中点, 连接
, 求证:
;
(3)如图3, 在(2) 的条件下, 当
旋转到
时, 若
, 求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.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/b1db2c0955e5a5be47faf855bca738a4.png)
(2)如图2, 点O是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22b65bfd6275fabb4988a47c4b8e85a.png)
(3)如图3, 在(2) 的条件下, 当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3255ac1b6f934fcb4aa742a81bd8aef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93bc4c9dd737193f7acce692b23500d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐2】如图1,在边长为1的正方形
中,E、F是
边上的两个动点,且满足
,连接
、
、
,
与
交于点G,连接
交
于点H,连接
.
![](https://img.xkw.com/dksih/QBM/2022/4/25/2965732021362688/2970148994113536/STEM/60d28a22-0c0e-4393-a9aa-9fb6b9fc97d4.png?resizew=339)
(1)求证:
.
(2)求线段
的最小值.
(3)如图2,若E、F重合时,延长
交
于M,
与
交于点N,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db2bb57997a95a28a5ba9a060f73eb7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://img.xkw.com/dksih/QBM/2022/4/25/2965732021362688/2970148994113536/STEM/60d28a22-0c0e-4393-a9aa-9fb6b9fc97d4.png?resizew=339)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b2bec5d24105fb3418702ccbed0ef23.png)
(2)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
(3)如图2,若E、F重合时,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9562218a423dc33577b3ee7b6702ff6c.png)
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解题方法
【推荐1】某数学学习小组在复习线段垂直平分线性质时,提出了以下几个问题,请你帮他们解决:
[数学理解]
(1)点
是线段
垂直平分线上的一点,则
的值为 ;
[拓展延伸]
(2)在平面直角坐标系
中,点
, 点
在
轴上,且
, 则点
的坐标为 .
(3)经小组探究发现,如图,延长线段
到点
,使
,以点
为因心,
长为半径作园,则对于
上任一点
,都有
,请你证明这个结论:
![](https://img.xkw.com/dksih/QBM/2020/6/25/2492398966988800/2493735520993280/STEM/b3fe3d38-a4b2-4496-8fbf-bc291efc80ec.png?resizew=215)
[问题解决]
(4)如图,某人乘船以25千米/时的速度沿一笔直的河
从码头
到码头
,再立即坐车沿一笔直公路以75千米/时的速度回到住处
,已知乘船和坐车所用的时间相等请在河
边上确定码头
的位置.(请画出示意图并简要说明理由)
[数学理解]
(1)点
![](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/4f10df508929d48a3a62587761241363.png)
[拓展延伸]
(2)在平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16c9f25703e265026af2d481e64414d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3695d75b3aec9a4c284e4f75282d65ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(3)经小组探究发现,如图,延长线段
![](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/6c75a0ca7fe4e3ec274d40e2cf2ee1ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b362dc3272f3ca8839eea9a6aa8067f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fdca3cd449fbdd9f6794fa81b0ddf9.png)
![](https://img.xkw.com/dksih/QBM/2020/6/25/2492398966988800/2493735520993280/STEM/b3fe3d38-a4b2-4496-8fbf-bc291efc80ec.png?resizew=215)
[问题解决]
(4)如图,某人乘船以25千米/时的速度沿一笔直的河
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/2020/6/25/2492398966988800/2493735520993280/STEM/0b66be4e-31df-44a3-b731-0cefdbcbd990.png?resizew=220)
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【推荐2】如何拍出大长腿的效果?
【数学眼光】
如图①,低角度拍摄,并结合仰拍技巧,可以有效地拉长腿部线条.
(1)针孔相机的成像原理:如图②,由于光的直射,人的足部A与头部B通过小孔O的成像分别在
,
处,线段
的像是线段
,
上点C的像是点C′.若
,求证:
.
(2)如图③,小美站立在A处,摄影师给小美仰拍.小美的身高
的像为
,腿部
的像为
.
①试说明能拍出大长腿效果的理由;
②若
,
,则
.
【数学眼光】
如图①,低角度拍摄,并结合仰拍技巧,可以有效地拉长腿部线条.
(1)针孔相机的成像原理:如图②,由于光的直射,人的足部A与头部B通过小孔O的成像分别在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5847696d036c8df1e22a1ad721efaf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17939984337d28d7283bd6dd62d9e455.png)
(2)如图③,小美站立在A处,摄影师给小美仰拍.小美的身高
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24cfad1ba71a78d8f415335cde2f8c52.png)
①试说明能拍出大长腿效果的理由;
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b1b02d38475f4498763b5f9b7e72ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aee59824387d1d3eddb2325ad53f34d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1d6de05d7b83f1308ecc96ef4162320.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
真题
【推荐1】如图①.在矩形
.
,点
在边
上,且
.动点
从点
出发,沿折线
以每秒
个单位长度的速度运动,作
,
交边
或边
于点
,连续
.当点
与点
重合时,点
停止运动.设点
的运动时间为
秒.(
)
和点
重合时,线段
的长为__________;
(2)当点
和点
重合时,求
;
(3)当点
在边
上运动时,
的形状始终是等腰直角三角形.如图②.请说明理由;
(4)作点
关于直线
的对称点
,连接
、
,当四边形
和矩形
重叠部分图形为轴对称四边形时,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cba4fbc01946de801b79ba560c42036.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60634341a9603e24b2bbc6960abe3d31.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/ab21061b918080d59d9452eb7f38e8fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8949230b7b92ae94d502271ceddc626f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae75d6a094ba5e9369cb8b019010bb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cdd9f345915ae742ed3dcd3f9678264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
![](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/e430f13f42cf2d44aa0f0e20b959684f.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e5229fc1d12d74d7f8d80aacd498e68.png)
(3)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76e07eb42af9fb16eb05c4f7d44b71d7.png)
(4)作点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca1d09859dfab140e55e3cc3e7d67d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56a787847e58ca4af5367e5026cae9a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aae083b6baead1cd64cbfa5f6c2f46eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】如图1,已知正方形
的边长为2,点E是边
的动点,将三角板的直角顶点与点E重合,直角边分别与线段
交于点F,与射线
相交于点G,连接
.
(1)求证∶![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2668d58fb09aeebf4eed0086811a180f.png)
(2)点E为线段
的中点
①如图2,当点G在线段
上运动时,(点G不与点D重合),设
,四边形
的周长是否随x的变化而变化?如果变化,试用含有x的代数式表示四边形
的周长,如果不发生变化,请说明理由
②如图3,连接
,交
于点P,交
于点Q,当
与
相似时,求
的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/10/de8fb7d8-b5a1-4f43-831c-a1c7f7ad0faa.jpg?resizew=116)
(1)求证∶
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2668d58fb09aeebf4eed0086811a180f.png)
(2)点E为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
①如图2,当点G在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96bc55510792f8bd30e1c0686609fe3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce463fb3ce4b3d49d470f66471fe4c15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce463fb3ce4b3d49d470f66471fe4c15.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/10/ecf3a749-7c79-4bcf-9257-8f8893965606.jpg?resizew=116)
②如图3,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00870385ca7f3214e2971779eb4c7904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59a0a6891259bf27be2280c6b6ba7430.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38b406c5eedbf3aaf8847070da22553b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/10/080ed9f2-a0de-4d43-a52e-bce460362ac5.jpg?resizew=118)
您最近一年使用:0次