如图,
,
,
,
,点
是
中点、点
是
中点,点
从
出发,以每秒
个单位的速度沿
运动
包括点
,
,
,到达
点停止,运动时间为
.
、
.
(2)当
为什么值时,
的面积是
.求出值,并简要说明理由.
(3)当
为何值时,四边形
是平行四边形,说明理由 并求此时线段
的长.
(4)当点
在边
上运动时,
是等腰三角形,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a6be08c747b22834f1425c6253eebc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.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/dddecece1723dbd262cf1293d1c76a1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404728d0ea2699c71e674f30dd984abd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ec5d678ec42846e1d28301e3bfd4be.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cff7399ecc698e2fb415147c96d0d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c0717eaf00a557ed418055453ef3f83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
(4)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cff7399ecc698e2fb415147c96d0d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
更新时间:2024-05-18 16:08:51
|
相似题推荐
解答题-作图题
|
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【推荐1】如图,已知平面直角坐标系中的
,点
、
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/f265d61e-e00b-467d-8c3b-f648350f23cc.png?resizew=239)
(1)画出
关于x轴的对称图形
,
(2)直接写出
的坐标______,
的坐标______.
(3)直接写出
的面积______;
(4)直接写出BC边上的高
______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c80eabaf101288433b3b9e92a4805a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c850811ba59a05e945a665196539a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0e8f9def040fc34d79e9a7ddf2f2c30.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/f265d61e-e00b-467d-8c3b-f648350f23cc.png?resizew=239)
(1)画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(3)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(4)直接写出BC边上的高
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
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【推荐2】如图AD=13,BD=12,∠C=90.,AC=3,BC=4,求阴影部分的面积.
![](https://img.xkw.com/dksih/QBM/2020/6/9/2480926165712896/2481738541776896/STEM/b0632ab4-3c84-4bec-afed-f686906876f2.png?resizew=211)
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解答题-证明题
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【推荐1】如图,在
中,点E为
的中点,连接
并延长交
的延长线于点F,连接
.
![](https://img.xkw.com/dksih/QBM/2022/4/1/2948686740291584/2957623723458560/STEM/10d37f1c-5f0a-4530-b7df-dd93eee6e8ae.png?resizew=196)
(1)求证:
.
(2)若
,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/2022/4/1/2948686740291584/2957623723458560/STEM/10d37f1c-5f0a-4530-b7df-dd93eee6e8ae.png?resizew=196)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235b2de6e8bee9ef4616b25d052699b8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc382c4f315de17f293d3d273626ade2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cea665cec1ac62f67579fa93f08f4b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cfc2771aa0d5b97d2297f8a26a6f6b1.png)
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【推荐2】如图,在
中,
是对角线
、
的交点,
,
,垂足分别为点
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/20/01637c42-d60f-4ca4-b3b1-e7e343cf3d3d.png?resizew=181)
(1)求证:
.
(2)若
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/d320f180419175d75eebc618cc458b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761a77e11e1e45c2a8b2d34d22cf8e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/20/01637c42-d60f-4ca4-b3b1-e7e343cf3d3d.png?resizew=181)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf2e3236ea30ee2c37928b98041f13a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d2231c7a2875ab6d423dff3ead4069.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af50cf2832f5f794166ea50dc1cd4964.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef1ad4e8c18117625abbdfe66b894a4.png)
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解答题-作图题
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【推荐1】如图,在
中,
是
边上一点,且
.
![](https://img.xkw.com/dksih/QBM/2022/4/1/2948790668156928/2953027219095552/STEM/5aaef9d9-45a4-49d4-abf0-6bafdf91462f.png?resizew=221)
(1)尺规作图(保留作图痕迹,不写作法),作
的角平分线交
于点
;
(2)F为CD中点,连接
,直接写出线段
和
的数量关系及位置关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/3ab0389bef7fea9fd2429966ef6bf2d8.png)
![](https://img.xkw.com/dksih/QBM/2022/4/1/2948790668156928/2953027219095552/STEM/5aaef9d9-45a4-49d4-abf0-6bafdf91462f.png?resizew=221)
(1)尺规作图(保留作图痕迹,不写作法),作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)F为CD中点,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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【推荐2】如图,在平面直角坐标系中,长方形OABC的两边分别在x轴和y轴上,
,
,现有两动点P、Q分别从O、C同时出发,P在线段OA上沿OA方向以每秒
个单位长度的速度匀速运动,运动到点A停止,Q在线段CO上沿CO方向以每秒1个单位长度的速度匀速运动,运动到点O停止,设运动时间为t秒.
点的坐标为______,
______,
______
用含t的代数式表示![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
当t为何值时,
的面积不小于
的面积?
当t为何值时,
的面积与
的面积的和为36?请求出t的值;连接AC,试探究此时线段PQ与AC之间的数量关系并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c369c98bed6ce2c620fdc3b70b5a5028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de06a56dde5b50851a9072b42f0fca7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/742145c3bfb5281e2e583e6405a3d4ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934affa7acaba6a9e4672c4136d07f42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c7aff2ea524bf905ac94f0edc7c2064.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78f3ccc7a3c3399c692409584a919261.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94c7bbcc033e4bf375ad224e5049a6c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e54b45858a3be989693fdacd5759b8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4bb89a362c1faf4d0c306eabbb59710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af77479b39efa371b53b476200c62383.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e54b45858a3be989693fdacd5759b8c.png)
![](https://img.xkw.com/dksih/QBM/2019/3/15/2161153156227072/2161676993880064/STEM/b0d81288925c4f199fdb41b29cdbde85.png?resizew=352)
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【推荐1】如图1,将矩形
放置于第一象限,使其顶点O位于原点,且点B,C分别位于x轴,y轴上.若
满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/29/8a2696be-54d4-420b-8936-d45068935126.png?resizew=362)
(1)求点A的坐标;
(2)取
中点M,连接
与
关于
所在直线对称,连
并延长交x轴于P点,求点P的坐标;
(3)如图2,在(2)的条件下,点D位于线段
上,且
.点E为平面内一动点,满足
,连接
,请你直接写出线段
长度的最大值_________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99ca6d348c4c0f53eb995246e1cb5ae7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2de78b3148620cc740e52edb9a791c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/865e18eba91e316a05e93e1ac468b8a7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/29/8a2696be-54d4-420b-8936-d45068935126.png?resizew=362)
(1)求点A的坐标;
(2)取
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b86fc4d33f06602f65f9911357c621a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9eace64a7b30fad3f34e660eaeb1efb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4cfef623a9534b5708df5f95f1760a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
(3)如图2,在(2)的条件下,点D位于线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8cc58ef27567f0ab06eb1012aec330.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a04081cb23be32fd60e70f5054652531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
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【推荐2】在
中,D为
上一点,以
为直径的
与
相切于点E,与
相交于点F,连结
,
,
.
,求
和
的大小;
(2)如图2,过点D作
交AB于点G,若
,且
,求
的半径.
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/100b3e7dcd5f34c5234971cd75bff138.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f389b13ce4e76c669fdc8b8b3265be9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6c19410c7abeae002ca97cfad4c791f.png)
(2)如图2,过点D作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34138573ca7f3555154f496e8dd99d1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cf5b86308e9f777a6611503ba8d0e9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e656d74fd51053beda23b6f8cb1d85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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【推荐3】2022版《数学课程标准》指明推理能力是指从一些事实和命题出发,依据规则推出其他命题或结论的能力,目前我们已经具备应用已学知识证明其他结论的能力.请阅读下列材料,完成相应任务.
【方法解析】
【数学思想】
(2)上述证明方法中主要体现的数学思想是________;
A.转化思想 B.类比思想 C.数形结合思想 D.从一般到特殊思想
【知识迁移】
(3)如图3,点
是线段
上一点,
,点
是线段上一点,分别连接
,
点
,
分别是
和
的中点,连接
.若
,
,
,请求
的长.
【方法解析】
求证:“直角三角形斜边上的中线等于斜边的一半” 如图1, ![]() ![]() ![]() ![]() ![]() 分析:要证明 ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
【数学思想】
(2)上述证明方法中主要体现的数学思想是________;
A.转化思想 B.类比思想 C.数形结合思想 D.从一般到特殊思想
【知识迁移】
(3)如图3,点
![](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/8b757f0c42ae5c9a2d6a4b19e5877b27.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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b65065ec3a0cb4b050989165c003d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8cc58ef27567f0ab06eb1012aec330.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a0268d04b9dea7629af27af9a0285a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
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