如图1,在正方形
中,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/21/d38b1475-d537-43a1-8047-198228c1c377.png?resizew=172)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/21/5d81bb54-f892-4ef3-a7d0-8d508b209a7a.png?resizew=162)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/21/63d61dce-e209-47f6-9072-6bf6182cd929.png?resizew=195)
(1)若
,求
的长.
(2)如图2,
是线段
上的一点,且
,求证:
是直角三角形.
(3)如图3是一个正方体,棱长
,
的中点
处有一只蚂蚁,蚂蚁从
处出发在正方体表面爬行,经过
上某点
处后继续沿直线方向爬到正方体的顶点
处.当
的值最小时,求
的长.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/21/d38b1475-d537-43a1-8047-198228c1c377.png?resizew=172)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/21/5d81bb54-f892-4ef3-a7d0-8d508b209a7a.png?resizew=162)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/21/63d61dce-e209-47f6-9072-6bf6182cd929.png?resizew=195)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(2)如图2,
![](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/f1d0d6dc13cf6b6d1a0e0c1d55ad0ba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
(3)如图3是一个正方体,棱长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67e9a07c6da555d4dfd9642858c5a7ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
更新时间:2022-07-15 22:39:23
|
相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】如图,在边长为1个单位长度的小正方形组成的正方形网格中,点A、B、C在小正方形的顶点上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/8/75b78bef-6bb5-4009-a514-4183534ddb7d.png?resizew=196)
(1)在图中画出与
关于直线l成轴对称的
;
(2)线段
被直线l______;
(3)在直线l上找一点P,使
的长最短;
(4)
的面积=______.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/8/75b78bef-6bb5-4009-a514-4183534ddb7d.png?resizew=196)
(1)在图中画出与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c021993da445858448d368df42554c8b.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ecac2dad4cffdd971fd23deacff3fc.png)
(3)在直线l上找一点P,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d1d99eab930cef884e01b97d4d56f1.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】如图,在长度为1个单位长度的小正方形组成的正方形网格中,△ABC的三个顶点A、B、C都在格点上.
(1)在图中画出与△ABC关于直线l成轴对称的△A1B1C1;
(2)在直线l上找出一点P,使得|PA﹣PC|的值最大;(保留作图痕迹并标上字母P)
(3)在直线l上找出一点Q,使得QA+QC1的值最小;(保留作图痕迹并标上字母Q)
(4)在正方形网格中存在 个格点,使得该格点与B、C两点构成以BC为底边的等腰三角形.
(1)在图中画出与△ABC关于直线l成轴对称的△A1B1C1;
(2)在直线l上找出一点P,使得|PA﹣PC|的值最大;(保留作图痕迹并标上字母P)
(3)在直线l上找出一点Q,使得QA+QC1的值最小;(保留作图痕迹并标上字母Q)
(4)在正方形网格中存在 个格点,使得该格点与B、C两点构成以BC为底边的等腰三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/27/d93bdc93-4d9a-4dec-a230-a0e567814642.png?resizew=186)
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解答题-作图题
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【推荐1】如图(1),矩形
的边
、
在坐标轴上,点
坐标为
,点
是射线
上的一动点,把矩形
沿着
折叠,点
落在点
处;
、
、
共线时,
;
(2)如图(2),当点
与点
重合时,
与
轴交于点
,过点
作
,交
于点
,请判断四边形
的形状,并说明理由;
(3)若点
正好落在
轴上,请画出示意图并直接写出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/132de9682ce9a412b7b517aa209726ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6967ebd791092c62b4ef97924d91883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e7f1d88a549851d8ba1543bd4333ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ff8c8d239cc12ddc3a899e9f054aa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/132de9682ce9a412b7b517aa209726ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfaca9396f85c0137b534903321fcbe.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/c5db41a1f31d6baee7c69990811edb9f.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/d9f63d194aa0d4091618b6f41f569ee2.png)
(2)如图(2),当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de4a54cc7818be87a239f6de5f5d05b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7b25692d4617daec79efe196c5ad8a8.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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解答题-问答题
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【推荐2】如图,四边形
中,
,
,
,
,P是
上任意一点,设
.
(1)直接写出线段
_________,
_______;(用含x的式子表示)
(2)当
时,求x的值;
(3)利用“数形结合”的思想,结合此图求代数式
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7d8397018b0a01a1b4e9574604f9e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a666403569e607f32af5f762c246dc7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/2/e05a4177-ac32-4295-ba90-d959741164bc.png?resizew=167)
(1)直接写出线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/524f25e1eedbfe399f7f42db890ab89a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a832202bcd57a91a9462590fda90b23d.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d057c8a707abd8d2e07e3b0fbbf8b81.png)
(3)利用“数形结合”的思想,结合此图求代数式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f49bcadf9607bfc794350bc11151e7ca.png)
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解答题-证明题
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【推荐2】如图,在
和
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/3/9/2674079846596608/2676115137110016/STEM/b017d268-4e77-4a85-a6c5-4b3ca3f832a2.png)
(1)若
,
,
,求
的大小;
(2)猜想线段
与
的关系,并证明你的猜想.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26813466e2ee49a493881a4384fc8748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://img.xkw.com/dksih/QBM/2021/3/9/2674079846596608/2676115137110016/STEM/b017d268-4e77-4a85-a6c5-4b3ca3f832a2.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb55961fe96e155242d18d98e5c2261.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df003447e98fd5ba9badd42177f345db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4598486f8c5ac28b1165b76e78105979.png)
(2)猜想线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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【推荐3】如图,在△ABC中,AB=4,AC=3,DE是BC的垂直平分线,交BC于点D,交AB于点E,AF⊥BC于点F.关于△ABC的形状,小明和小亮展开以下讨论:
小明:如果△ABC是直角三角形,那么我可以求出AE的长.
我的思路是这样的:如图,连接CE,设AE=x,则BE=4-x,因为DE是BC的垂直平分线,所以CE=BE=4-x…
小亮:如果DF的长为
,此时△ABC是直角三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/3/e36c7e28-d5ff-4db1-966a-6e03c519b925.png?resizew=152)
(1)请补充完整小明的求解过程;
(2)请判断小亮的说法是否正确?并说明理由.
小明:如果△ABC是直角三角形,那么我可以求出AE的长.
我的思路是这样的:如图,连接CE,设AE=x,则BE=4-x,因为DE是BC的垂直平分线,所以CE=BE=4-x…
小亮:如果DF的长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4401b1421c08e525643180aef3f6dadd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/3/e36c7e28-d5ff-4db1-966a-6e03c519b925.png?resizew=152)
(1)请补充完整小明的求解过程;
(2)请判断小亮的说法是否正确?并说明理由.
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【推荐1】下面是华师版八年级下册数学教材第121页的部分内容.
(1)请根据上述内容,结合图①,写出完整的证明过程.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/b0f4c42d-2187-4ae7-9188-b5288a415900.png?resizew=122)
(2)如图②,在四边形
中,
交
于点F,交
于点
,点G是线段
上的一个动点,连结
.当四边形
的面积是4时,线段
的长度为_______.
如图,在正方形![]() ![]() ![]() ![]() |
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/b0f4c42d-2187-4ae7-9188-b5288a415900.png?resizew=122)
(2)如图②,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7dc3fe2348bfdc744efb6071e9adff3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/073b71cf995b38ebfe7fd52d696ab354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c17201e5f3caab3d576ce1fb3026c91d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e6710032c6a3b3d0fc1ddfd581fcfbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/d445ff7e-6f11-4cc7-9d0d-2595839a2df5.png?resizew=134)
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【推荐2】【证明推断】
(1)如图①,在正方形
中,点
是对角线
上一点,过点
作
,
的垂线,分别交直线
于点
,
.
①求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
;
②推断:
的值为______.
【类比探究】
(2)如图②,在矩形
中,
,点
是对角线
上一点,过点
作
,
的垂线分别交直线
于点
,
,探究
的值(用含
的式子表示),并写出探究过程.
(1)如图①,在正方形
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef5b6d970ace297c166b7b45b5ef3a65.png)
②推断:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd01a4cbd347fce1a7414eb9fa73d16.png)
【类比探究】
(2)如图②,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1d3328b14c14879619e3ad894f7fe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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