已知,在平面直角坐标系中,O为坐标原点,点A的坐标为
,点B的坐标为
,其中a、b满足
.
(1)求点A、点B的坐标;
(2)将A点向右平移m个单位(
)到C,连接BC.
①如图1,若
交y轴于点H,且
,求满足条件的m的取值范围(说明:
表示三角形ABC的面积,后面类似);
②如图2,若
,
平分
交
于点G,已知点D为x轴负半轴上一动点(不与B点重合),射线
交直线AB交于点E,交直线AG于点F,试探究D点在运动过程中
、
、
之间是否有某种确定的数量关系?直接写出你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4a90cfdbfa05577b6ec0b22739e7c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fabe33b24e9cabf7a5530bc75d37da2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e62c7aac587c47ea9b69b348fb3f67.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/22/bfa9ffb4-5b02-4642-bf2f-149e9d5e18c5.png?resizew=397)
(1)求点A、点B的坐标;
(2)将A点向右平移m个单位(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
①如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e342a901bb2b499d5ff18f6395d7e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5cbff84327e964f912a54032e76ccc9.png)
②如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e34f42b3be15518c29e3689c9fe6d6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7ea03277f8408fabe5b327cc34838f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d16fab0f52c8af5abba0bf19a06ea0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/936f5f26aac7197d42a41081fb1fda0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90026b96116424a245b335b1adb886b.png)
更新时间:2023-10-13 21:32:50
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【推荐3】如图,在平面直角坐标系中,点O为坐标原点,点
中的横坐标x与纵坐标y满足
,过点A作x轴的垂线,垂足为点D,点E在x轴的负半轴上,且满足
,线段
与y轴相交于点F,将线段
向右平移8个单位长度,得到线段
.
(1)直接写出点A和点E的坐标;
(2)在线段
上有一点G,连接
,若点G的纵坐标为m,
的面积为S,请用含m的式子表示S(不要求写m的取值范围);
(3)在(2)的条件下,当
时,动点P从点D出发,以每秒1个单位长度的速度沿着线段
向终点A运动,动点Q从B点出发以每秒2个单位长度的速度沿着线段
向终点C运动,点P,Q同时出发,当其中一点到达终点时,另一点也随之停止运动,设运动时间为t秒,当
的面积是
面积的2倍时,求点t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4129d82d56064bf6054ed22ca192c55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8294a133e3f3cbe9ca09491a50831ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b34233772c4c26d6669499d9b1f15a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/11/4eb00c5a-3910-4d22-925a-23a7e1f9496d.png?resizew=522)
(1)直接写出点A和点E的坐标;
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/191a8aaa24019979997c7530080b5a68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/029ad83f1a3262048cba0e650b63e929.png)
(3)在(2)的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f010067077b202e8cc1ce8e3c6ff75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a74dcc0974a27720e7bc2ac58c13e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a74150f253eba09aef2cd96c2199dfc.png)
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【推荐1】在平面直角坐标系xOy中,过点A(2,2)作x轴,y轴的垂线,与反比例函数
的图象分别交于点B,C,直线AB与x轴相交于点D.
(1)当
时,求线段AC,BD的长;
(2)当AC<2BD时,直接写出k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3ad95a113b479107d1aad20c7fb4d9.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bef6d3dd89c1f9696320616f569d1d63.png)
(2)当AC<2BD时,直接写出k的取值范围.
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【推荐2】如图所示,设∠BAC=α(0°
α
90°),现把等长的小棒依次向右摆放在两射线之间,并使小棒两端分别落在射线AB,AC上,从点A1开始,其中A1A2为第一根小棒,且A1A2=AA1.
(1)若已经摆放了3根小棒,则∠α1= ;∠α2= ;(用含α的式子表示),若A4A3C=92°,求∠BAC的度数.
(2)若只能摆放6根小棒,求α的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
(1)若已经摆放了3根小棒,则∠α1= ;∠α2= ;(用含α的式子表示),若A4A3C=92°,求∠BAC的度数.
(2)若只能摆放6根小棒,求α的范围.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/25/b12205c0-339c-4670-a582-ff60dac40f38.png?resizew=309)
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【推荐3】学校装修录播教室需用A型板材120块,B型板材90块,A型板材规格是
的标准板材.一张标准板材尽可能多地裁出A型、B型板材,共有下列三种裁法:(如图是裁法一的剪裁示意图)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/4/5f5074af-a720-4b4b-bf58-7d7001427c1b.png?resizew=100)
若所购的保准板材全部裁完,其中按裁法一裁x张、按裁法二与裁法三分别裁若干张,且所裁出的A、B两种型号的板材刚好够用.
(1)上表示,m= ,n= .
(2)用含有x的代数式分别表示裁法二与裁法三的张数;
(3)所购标准板材的总张数能不能为82张?若能,求出此时x的值;若不能,请说出理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b613c7a24a9a4afd28bb4a9f1fc3a788.png)
裁法一 | 裁法二 | 裁法三 | |
A型板材块数 | 1 | 2 | 0 |
B型板材块数 | 2 | m | n |
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/4/5f5074af-a720-4b4b-bf58-7d7001427c1b.png?resizew=100)
若所购的保准板材全部裁完,其中按裁法一裁x张、按裁法二与裁法三分别裁若干张,且所裁出的A、B两种型号的板材刚好够用.
(1)上表示,m= ,n= .
(2)用含有x的代数式分别表示裁法二与裁法三的张数;
(3)所购标准板材的总张数能不能为82张?若能,求出此时x的值;若不能,请说出理由.
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【推荐1】(1)问题情境:如图1,AB//CD,∠PAB=120°,∠PCD=130°,求∠APC的度数.
小辰的思路是:如图2,过点P作PE//AB,通过平行线性质,可求得∠APC的度数,请写出具体求解过程.
(2)问题迁移:
①如图3,AD//BC,点P在射线OM上运动,当点P在A,B两点之间运动时,设∠CPD=∠
,∠ADP=
,∠BCP=∠
,问:∠
、
、∠
之间有何数量关系?请说明理由.
②在①的条件下,如果点P不在A,B两点之间运动(点P与点A,B,O三点不重合),请直接写出∠
、
、∠
间的数量关系.
小辰的思路是:如图2,过点P作PE//AB,通过平行线性质,可求得∠APC的度数,请写出具体求解过程.
(2)问题迁移:
①如图3,AD//BC,点P在射线OM上运动,当点P在A,B两点之间运动时,设∠CPD=∠
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
②在①的条件下,如果点P不在A,B两点之间运动(点P与点A,B,O三点不重合),请直接写出∠
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/18/9dca9f61-ea17-403f-b7a2-c970ca1b9d5e.jpg?resizew=618)
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【推荐2】平面内的两条直线有相交和平行两种位置关系.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/3b2ec369-7bf6-494f-9972-f946da7ff855.png?resizew=316)
(1)如图1,若
,点P在
、
内部,
,求
.
(2)如图2,在
的前提下,将点P移到
外部,则
之间有何数量关系?请证明你的结论.
(3)如图3,写出
的度数
__________.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/3b2ec369-7bf6-494f-9972-f946da7ff855.png?resizew=316)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.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/fb07f4c782b0a7ccf6416e5e73f06928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbf1667b21a273bf5dd007d65eeda7c.png)
(2)如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28d2790a97390935125aa897417f970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d2be35f1a4bb07990830df833617a6f.png)
(3)如图3,写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec7cc870cceb6d09d0f38cebdb131e72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
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【推荐1】已知,如图甲,在△ABC中,AE平分∠BAC(∠C>∠B),F为AE上一点,且FD⊥BC于D.
(1)试说明:∠EFD=
(∠C﹣∠B);
(2)当F在AE的延长线上时,如图乙,其余条件不变,(1)中的结论还成立吗?请说明理由.
(1)试说明:∠EFD=
![](https://img.xkw.com/dksih/QBM/2017/5/5/1680476091006976/1735691388092416/STEM/4b363b2d2a9042699248d5d41ed081ea.png?resizew=13)
(2)当F在AE的延长线上时,如图乙,其余条件不变,(1)中的结论还成立吗?请说明理由.
![](https://img.xkw.com/dksih/QBM/2017/5/5/1680476091006976/1735691388092416/STEM/fbe9e069912548d68121b9ce5ccbb58d.png?resizew=359)
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【推荐2】如图1,在平面直角坐标系中,
是直角三角形,
,斜边
与
轴交于点
.
(1)若
,求证:
;
(2)如图2,延长
交
轴于点
,过
作
,若
,
,求
的度数;
(3)如图3,
平分
,
的平分线交
的延长线于点
,
,当
绕
点旋转时(斜边
与
轴正半轴始终相交于点
),问
的度数是否发生改变?若不变,求其度数;若改变,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ccc37b189fa2cbc269ca0b233dac37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/19/1f11d19a-4389-4cbf-8b6b-d74455190a94.png?resizew=484)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bda00c394bf5247e9b7e46b7da0817f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a4f531c465dae87204f72daf98c009a.png)
(2)如图2,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cee097d4fe948c3d4f1b5c28b24adf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f4870ff8fd91dcaed239abf4e5f3ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c226581e14091779321c9fe91160ceef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92f279be7c8a11dcd2c0a97116bdcbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70ee72b8942479ea23b5246d83c1609e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecff6005f926665a926c07ad62e0f032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c5840e0454fdec7d2158072c43b8db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/19768d8c55deb4973820aeab7a224e6a.png)
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