在四边形
中,
,
,
,
,
,点P从点B开始沿
向点C以每秒
的速度移动,点Q从点D开始沿
以每秒
的速度移动,设运动时间为t秒,连接
.
的长度是__________
;
(2)当
________时,线段
平分
;
(3)当
________时,
;
(4)当t为何值时,四边形
的面积是
;(请说明理由)
(5)当t为何值时,Q在
的中垂线上.(请说明理由)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b79850d6b00a67110e77a33d1c46b5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/720cf0c17cd163f804497aeee03b5828.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b2589e4bb57ab742462dd935669dec5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976260cbf5e30856d4fd37a4b0a671a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78d0ab561d0c9bb9099772c596af8bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/902f24325565a9dd95128a633a240da2.png)
(4)当t为何值时,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ba8f60b5b1c1e342ed0851ed3bb7891.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0338dbafe353efbd4724d64292910810.png)
(5)当t为何值时,Q在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
23-24八年级上·山东青岛·阶段练习 查看更多[2]
山东省青岛市市北区青岛弘毅中学(青岛第二实验初级中学分校)2023-2024学年八年级上学期10月月考数学试题(已下线)八年级数学期末必刷题03(压轴题,40题11种题型)-2023-2024学年八年级数学下学期期末考点大串讲(苏科版)
更新时间:2023-11-05 11:09:43
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相似题推荐
解答题-问答题
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名校
【推荐1】【定义新知】在数轴上,点
和点
分别表示数
和
,可以用
表示点
、
两点间的距离.
【初步应用】
1.点
、
、
在数轴上对应的数分别是
、4、x.解答下列问题:
①
,若
,则
.
②
的最小值为 .
③若
,且x为整数,则x的取值有 个.
综合应用】
2.已知点
、
、
在数轴上对应的数分别是
、2、5.动点
沿数轴从
点向右运动,到达点
后立刻返回,再回到
点时停止运动,在此过程中,动点
的运动速度始终保持每秒3个单位长度,设点
的运动时间为
秒.
①当
秒时,
;
②在整个运动过程中,请用含
的代数式表示
![](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/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57d7224242ab75080dfb394a39ebf7f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/10/c9a05c8c-9157-4b8a-ba58-fb85db4378f0.png?resizew=354)
【初步应用】
1.点
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7438a7ce828983491700770dfd1d51ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e26c3d0a379840dc9e7b06ba16aa51b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9d77d4c13f91043eccc209c13f949a.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6beabf7c29813b1b5f21f78917653077.png)
![](https://img.xkw.com/dksih/QBM/2023/9/15/3325446055895040/3341778907824128/STEM/d5a9ad953ccb41bc87abe6c963b10d81.png?resizew=10)
2.已知点
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f0b2a9ef868ed28407ee79429eb962.png)
②在整个运动过程中,请用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d795d48c585fbf0635601cb906aa334.png)
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【推荐2】如图,直线
上有
、
两点,
,点
是线段
上的一点,OA=2OB,
(1)
________
,
________
;
(2)若点C是线段AB上一点,且满足
,求CO的长;
(3)若动点
、
分别从点
、
同时出发,在直线
上向右运动.点P的速度为
,点
的速度为
,设动点
、
运动的时间为
,当点
与点
重合时,
、
两点都停止运动,求当
为何值时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/8b79850d6b00a67110e77a33d1c46b5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186354626d5a1d13b88dfb4df916947b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a548e8a2e2205f2faa87e25180a083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a836d2dfc31d2bfc949bac8403cf2a4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
(2)若点C是线段AB上一点,且满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/649669f36a435f1f9fdc14a4e88529e0.png)
(3)若动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc2d9b900111188aca83126dff97f32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b9174c3b1324cf81098e42e0480bcc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e78a5de271acd2c3638732ff0c1cfcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/763032ce76fdaf5c27bc93f550501341.png)
![](https://img.xkw.com/dksih/QBM/2019/5/7/2198460557803520/2198541563953152/STEM/e4ef0458a2fb4160af294b1c10ffd9f2.png?resizew=409)
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【推荐3】某数学兴趣小组进行课题学习:用长方形硬纸板制作长方体纸盒.
材料:长方形硬纸板
,
长为15,
长为3.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/668e6a87-c565-40d0-895c-ef7def1a534e.png?resizew=536)
(1)初步感受:如图①,在长方形硬纸板四个角上剪去四个边长为1的小正方形,将剩下的硬纸板折叠成无盖的长方体纸盒,则该长方体纸盒底面周长为______;
(2)深入探究:兴趣小组为了充分利用硬纸板(硬纸板无剩余),采用新的裁剪方法:如图②所示,用
把长方形
分成2个长方形,将长方形
折叠成纸盒的侧面,将长方形
做纸盒的下底面,做成一个无盖 的长方体纸盒,请你求这个纸盒底面的边长;
(3)问题解决:在以上操作的启发之下,你能充分利用 该长方形硬纸板(硬纸板无剩余),制作一个有盖 的长方体纸盒吗?若能,请画出两种裁剪设计图并求出所做纸盒的底面边长,若不能,请说明理由.
材料:长方形硬纸板
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/668e6a87-c565-40d0-895c-ef7def1a534e.png?resizew=536)
(1)初步感受:如图①,在长方形硬纸板四个角上剪去四个边长为1的小正方形,将剩下的硬纸板折叠成无盖的长方体纸盒,则该长方体纸盒底面周长为______;
(2)深入探究:兴趣小组为了充分利用硬纸板(硬纸板无剩余),采用新的裁剪方法:如图②所示,用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
(3)问题解决:在以上操作的启发之下,你能
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【推荐1】如图,直线
与坐标轴分别交于点A,
,与直线
交于点
,线段
上的点
以每秒1个长度单位的速度从点
出发向点A做匀速运动,运动时间为
秒,连接
.
(1)写出点
的坐标________;
(2)若
是等腰直角三角形,则
的值为________;
(3)若
平分
的面积,求直线
对应的函数关系式;
(4)若点
与点
、
、
组成的四边形为平行四边形,则点
为________;
(5)点
是直线
上一点,点
是直线
上一点,连接线段
,若
轴,且
,写出符合条件的点
的坐标________;
(6)将
绕点
旋转
后,交
轴于点
,则
长为________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e434a6fc177990ab7f2b604c111e1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/16/13c5bcb6-b2a2-40b8-822a-40dc1d224dd6.png?resizew=263)
(1)写出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7af3d733e964a4cd8cc2833cecdbe040.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173bc7a36757d77f01213411edd25241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
(4)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/dad2a36927223bd70f426ba06aea4b45.png)
(5)点
![](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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5125f17b4e2eab992b9a17dea1e86c5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02e47bb98258ebfcf1d8ad4bac10b7ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(6)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
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【推荐2】我们定义:有一组对角相等而另一组对角不相等的凸四边形叫做“等对角四边形”.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/614dbfec-9efa-4437-b8f1-d839d50067b8.png?resizew=306)
(1)已知四边形
是“等对角四边形”,
,
,则
=________°,
=_________°.
(2)如图1,在
中,
,
为斜边
边上的中线,过点
作
垂直于
交
于点
,试说明四边形
是“等对角四边形”.
(3)如图2,在
中,
,
,
,
平分
,点
在线段
延长线上,以点
为顶点构成的四边形为“等对角四边形”,求线段
的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/614dbfec-9efa-4437-b8f1-d839d50067b8.png?resizew=306)
(1)已知四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58c2079ca489d450030f36bca834286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0374c406b563f0d258aa5c2654bbd06e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c543c3ddc3723fde6bbfca3ea3b921b.png)
(2)如图1,在
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c42bce098904b241986bb91c65ab33.png)
(3)如图2,在
![](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/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.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/2f10f40a076e8ddd2559dcfd49f9fd35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
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【推荐3】如图(1)
ABC和
DEC都是等腰直角三角形,其中∠ACB=∠DCE=90°,BC=AC,EC=DC,点E在
ABC内部,直线AD与BE交于点F,线段AF、BF、CF之间存在怎么样的数量关系?
![](https://img.xkw.com/dksih/QBM/2022/4/18/2960748935004160/2961702669262848/STEM/be891ea7-f371-48cf-80a5-98721813d29d.png?resizew=688)
(1)先将问题特殊化如图2,当点D、F重合时,直接写出线段AF、BF、CF之间的数量关系式: ;
(2)再探究一般情况如图1,当点D、F不重合时,证明(1)中的结论仍然成立.
(3)如图3,若
ABC和
DEC都是含30°的直角三角形,若∠ACB=∠DCE=90°,∠BAC=∠EDC=30°,点E在
ABC内部,直线AD、BE交于点F,直接写出一个等式,表示线段AF、BF、CF之间的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://img.xkw.com/dksih/QBM/2022/4/18/2960748935004160/2961702669262848/STEM/be891ea7-f371-48cf-80a5-98721813d29d.png?resizew=688)
(1)先将问题特殊化如图2,当点D、F重合时,直接写出线段AF、BF、CF之间的数量关系式: ;
(2)再探究一般情况如图1,当点D、F不重合时,证明(1)中的结论仍然成立.
(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
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【推荐1】如图1,在矩形
中,点E,F分别是边
上的点,连接
,且
于点G,若
,求
的值.
(2)如图2,在
中,
,点D为
的中点,连接
,过点A作
于点E,交
于点F,求
的值.
中,
,
,
,点E,F分别在边
上,且
,垂足为G,则
______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef452e2f744453e97fca1aa453ebf802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90bd6528cc90b9b607cbe3a181c73390.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18964fe6de2fd616b689ae0f8b1ac97f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d83e40b26f6a76e7897353f5699db4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ffa85c34fdc3f25143ec84888ff2d25.png)
(2)如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cfebe37cc30ca0e45b975f194388bf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2b43fef3e03ab7d63d376eb5e0da737.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/53c51c25b65a37b676ae3c3b71c29f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3574c3a4b2ac271cd679789681eb1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b07841ed8d7ded4bd7533e1d0fae931d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98bd7366c7c0db91f92692429816c9a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/137717f0e360e82319ced7e3a6c69b2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f87b02b744534ae1ed700d21fcceb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74e2da60823a045e1ecb82f478fb8300.png)
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【推荐2】综合与实践
问题情境:
已知正方形
,点
是
边上一点,将正方形
绕点
顺时针旋转,得到正方形
,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/8/9088a0a6-0cbb-4a43-b595-697060f8485b.png?resizew=423)
猜想证明:
(1)当
时,如图(1),
①连接
,
,
,求证:四边形
是矩形;
②试猜想线段
,
之间的数量关系,并说明理由.
解决问题:
(2)当
时,
①
______________(用含
的式子表示);
②当
,且点
在
的延长线上时,如图(2),若
,求
的长.
问题情境:
已知正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d609847e2ff3d64e5a514582c3ead0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/8/9088a0a6-0cbb-4a43-b595-697060f8485b.png?resizew=423)
猜想证明:
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c8dbc31b2e14067ef2f34b4e25f114.png)
①连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffb952f86442845da723fd291564484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ecac2dad4cffdd971fd23deacff3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0f0ccc8492a0ccf1eee24867060643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2131c5ec585f0cb29c28613011459d8e.png)
②试猜想线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
解决问题:
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c432964f92f710068727d715a7307613.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6969c2f53a3e3a4293e36a824b5c7574.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be604061cf1591f7069472269d4c9719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
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【推荐1】如图,在平面直角坐标系中,已知直线
交y轴于点A,交x轴于点B,点
(0,
),直线DE为AB的中垂线,垂足为点E,交x轴于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/6f1660dc-eb87-46f8-b67a-30ef84f43d2c.png?resizew=505)
(1)如图1,点E的坐标为______,直线DC的表达式为______;
(2)如图1,若点M为直线CD上一个动点,且点M在第一象限,过点M作
轴,交直线AB于点N,当四边形AMND为菱形时,求点M的坐标;
(3)如图2,点P为x轴上的一个动点,连接PA,PD,将△ADP沿DP翻折得到
,当
时,点P的坐标为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f498fe4cd876695ab6512729ecba7f19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289d7a880379d6060065c829b45b0ed6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32db5b9f56b2ae4ea67ec4d5f6e63626.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/6f1660dc-eb87-46f8-b67a-30ef84f43d2c.png?resizew=505)
(1)如图1,点E的坐标为______,直线DC的表达式为______;
(2)如图1,若点M为直线CD上一个动点,且点M在第一象限,过点M作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf20f734ac54ab0eec2e1c170a3a24f1.png)
(3)如图2,点P为x轴上的一个动点,连接PA,PD,将△ADP沿DP翻折得到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae97de31d8aa165c21d4e4a4f3a9e4a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bedc3e5bdb344899ecadbcec54676d1b.png)
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【推荐2】如图,在
中,
,射线
.点
从点
出发,沿
以每秒
的速度向终点
运动.过点
作
交射线
于点
.以
为一边向上作正方形
,设点
的运动时间为
(秒):
![](https://img.xkw.com/dksih/QBM/2020/12/7/2609018734247936/2609674508967936/STEM/57d3a7bf531b4b089fe2fa98aed796d9.png?resizew=650)
(1)如图1,当点
与点
重合时,正方形
的面积;
(2)如图2,作点
关于直线
的对称点
,连结
;
①当点
从点
运动到
的中点时,求点
的运动路径长;
②当
与
的边垂直或平行时,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ed244a6dcf7681c132813e640c8b2f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8773a9f4705054f33d79d06fbd34d481.png)
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91c6e55bca72a472f3bedf5896d6139b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d84733f9dc908ceb11459cc2aed580ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/2020/12/7/2609018734247936/2609674508967936/STEM/57d3a7bf531b4b089fe2fa98aed796d9.png?resizew=650)
(1)如图1,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/43ac79e422ba4876949f0514c44539b1.png)
(2)如图2,作点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8305c4ffbf876642440c3d28e91e9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb12b7108cfeb1bf74335c6dc29dd33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3be451ce5fad246389ccf4864929d81d.png)
①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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb12b7108cfeb1bf74335c6dc29dd33.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3be451ce5fad246389ccf4864929d81d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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解题方法
【推荐3】如图,在长方形ABCD中,AB=4cm,BE=5cm,点E是AD边上的一点,AE、DE分别长acm、bcm,满足(a﹣3)2+|2a+b﹣9|=0.动点P从B点出发,以2cm/s的速度沿B→C→D运动,最终到达点D.设运动时间为ts.
![](https://img.xkw.com/dksih/QBM/2020/7/9/2502293094334464/2503091779977216/STEM/7337cbcd-f4dd-4fe1-a439-8e92b36a4a9d.png?resizew=271)
(1)a= cm,b= cm;
(2)t为何值时,EP把四边形BCDE的周长平分?
(3)另有一点Q从点E出发,按照E→D→C的路径运动,且速度为1cm/s,若P、Q两点同时出发,当其中一点到达终点时,另一点随之停止运动.求t为何值时,△BPQ的面积等于6cm2.
![](https://img.xkw.com/dksih/QBM/2020/7/9/2502293094334464/2503091779977216/STEM/7337cbcd-f4dd-4fe1-a439-8e92b36a4a9d.png?resizew=271)
(1)a= cm,b= cm;
(2)t为何值时,EP把四边形BCDE的周长平分?
(3)另有一点Q从点E出发,按照E→D→C的路径运动,且速度为1cm/s,若P、Q两点同时出发,当其中一点到达终点时,另一点随之停止运动.求t为何值时,△BPQ的面积等于6cm2.
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