如图,点A是射线OE:y=x(x≥0)上的一个动点,过点A作x轴的垂线,垂足为B,过点B作OA的平行线交∠AOB的平分线于点C
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/11/49d9e086-3e9d-4f56-abf4-190a4c6279a2.png?resizew=510)
(1)若A点坐标为(2,2),求BC的长度;
(2)如图2,过点C作CG⊥AB于点G,CH⊥OE于点H,求证:AC平分∠BAE.
(3)在(1)的条件下,射线OC与AB交于点D,在第一象限内是否存在一点P使得△PCA≌△BDC?若存在,请求出点P的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/11/49d9e086-3e9d-4f56-abf4-190a4c6279a2.png?resizew=510)
(1)若A点坐标为(2,2),求BC的长度;
(2)如图2,过点C作CG⊥AB于点G,CH⊥OE于点H,求证:AC平分∠BAE.
(3)在(1)的条件下,射线OC与AB交于点D,在第一象限内是否存在一点P使得△PCA≌△BDC?若存在,请求出点P的坐标;若不存在,请说明理由.
更新时间:2022-09-10 01:21:15
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【推荐1】如图1,在平面直角坐标系中,
,
.
(1)点
关于
轴的对称点在第一象限,
为实数
的范围内的最大整数,
点的坐标______,
的面积______.
(2)在(1)的条件下,点
是第一象限的点,且
是以
为腰的等腰直角三角形,点
坐标______.
(3)在(1)的条件下,如图2,
时,以
、
的作等边三角形
和等边
,连接
、
交于
点,连接
.
点是
轴上一动点,
的最小值______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c240561788bc63f41a6703219fb66d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0af3baedbfeb9b0b2869f20e26125ba.png)
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(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88194e87d2875d066ca6ad2d1a4c63fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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(2)在(1)的条件下,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)在(1)的条件下,如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70b449b1b22749f6efd914f26b1f71ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7189182cc23d759be2764d141952737b.png)
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【推荐2】在平面直角坐标系xoy中,对于某点P(P不是原点),称以点P为圆心,
长为半径圆为点P的半长圆;对于点Q,若将点P的半长圆
绕原点旋转,能够使得点Q位于点P的半长圆内部或圆上,则称点Q能被点P半长捕获(或点P能半长捕获点Q).
(1)在平面直角坐标系xoy中,点M(2,0),则点M的半长圆的面积为 ;下列各点
,能被点M半长捕获的点有 ;
(2)已知点
,
①点N(0,n),当t=1时,线段EF上的所有点均可以被点N半长捕获,求n的取值范围;
②若对于平面上的任意点(原点除外)都不能半长捕获线段EF上的所有点,直接写出t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b64dc1ab9bf65cfdaac7633e9a7958ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1d9218917d85a1dc19e60f076b8bfa.png)
(1)在平面直角坐标系xoy中,点M(2,0),则点M的半长圆的面积为 ;下列各点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0e6fba5fb9c97d07b22ddd1499c3b1.png)
(2)已知点
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①点N(0,n),当t=1时,线段EF上的所有点均可以被点N半长捕获,求n的取值范围;
②若对于平面上的任意点(原点除外)都不能半长捕获线段EF上的所有点,直接写出t的取值范围.
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【推荐1】我们把由不平行于底边的直线截等腰三角形的两腰所得的四边形称为“准等腰梯形”.如图1,四边形ABCD即为“准等腰梯形”.其中∠B=∠C.
![](https://img.xkw.com/dksih/QBM/2013/7/24/1573671586824192/1573671593172992/STEM/ea089f6e5487481f9754043b23c7f044.png?resizew=197)
(1)在图1所示的“准等腰梯形”ABCD中,选择合适的一个顶点引一条直线将四边形ABCD分割成一个等腰梯形和一个三角形或分割成一个等腰三角形和一个梯形(画出一种示意图即可).
(2)如图2,在“准等腰梯形”ABCD中,∠B=∠C,E为边BC上一点,若AB∥DE,AE∥DC,求证:
;
![](https://img.xkw.com/dksih/QBM/2013/7/24/1573671586824192/1573671593172992/STEM/6d627b49a1684f8f88aa57530a128220.png?resizew=187)
(3)在由不平行于BC的直线截△PBC所得的四边形ABCD中,∠BAD与∠ADC的平分线交于点E,若EB=EC,请问当点E在四边形ABCD内部时(即图3所示情形),四边形ABCD是不是“准等腰梯形”,为什么?若点E不在四边形ABCD内部时,情况又将如何?写出你的结论(不必说明理由)
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(1)在图1所示的“准等腰梯形”ABCD中,选择合适的一个顶点引一条直线将四边形ABCD分割成一个等腰梯形和一个三角形或分割成一个等腰三角形和一个梯形(画出一种示意图即可).
(2)如图2,在“准等腰梯形”ABCD中,∠B=∠C,E为边BC上一点,若AB∥DE,AE∥DC,求证:
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(3)在由不平行于BC的直线截△PBC所得的四边形ABCD中,∠BAD与∠ADC的平分线交于点E,若EB=EC,请问当点E在四边形ABCD内部时(即图3所示情形),四边形ABCD是不是“准等腰梯形”,为什么?若点E不在四边形ABCD内部时,情况又将如何?写出你的结论(不必说明理由)
![](https://img.xkw.com/dksih/QBM/2013/7/24/1573671586824192/1573671593172992/STEM/c0a7ff0ced25418e885f057fa2b824a0.png?resizew=184)
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【推荐2】如图1,在
中,
平分
平分
与
交于点O.
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(1)如图1,若
,
①求
的度数;
②作
于点F,求证:
;
(2)如图2,若
,则
的值为____________.
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(1)如图1,若
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①求
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②作
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【推荐1】如图,四边形ABCD为平行四边形,∠ABC的角平分线BE交AD于点E,连接AC交BE于点F.
![](https://img.xkw.com/dksih/QBM/2022/5/11/2976879681036288/2981584288571392/STEM/7b7fe699-8fcc-4d9d-9a0c-db249995b0b2.png?resizew=343)
(1)求证:BC=CD+ED;
(2)若AB⊥AC,AF=3,AC=8,求AE的长.
![](https://img.xkw.com/dksih/QBM/2022/5/11/2976879681036288/2981584288571392/STEM/7b7fe699-8fcc-4d9d-9a0c-db249995b0b2.png?resizew=343)
(1)求证:BC=CD+ED;
(2)若AB⊥AC,AF=3,AC=8,求AE的长.
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【推荐2】在
中,
,点D在边
上(不与点A、B重合),以
为半径的
与射线
相交于点E,射线
与射线
相交于点F,射线
与
交于点G,
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/16/7ab42a43-0ca0-41d1-8428-c946377297f3.png?resizew=190)
(1)如图1,设
,用含x的代数式表示
的长;
(2)如果点E是
的中点,求
的余切值;
(3)如果
为等腰三角形,直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
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(1)如图1,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2633a6f46b0847158eebb05c743561aa.png)
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(2)如果点E是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c492dd4656d4e80b8da3c4820d4f8b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90026b96116424a245b335b1adb886b.png)
(3)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d79c5041878c15de69253ca11a03ab1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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【推荐1】如图1,在平面直角坐标系中,点
是坐标原点,直线
交
轴于点
,交
轴于点
,且
.
(1)求直线
的解析式;
(2)如图2,点
在线段
上(不与
重合),连接
交
于点
,设点
的横坐标为
,
的面积为
,求
与
之间的函数解析式;
(3)在图2中,
时,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d782697ae0a30818af043d523d9893.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c0a6efe18abe173b91498ff750cd62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/2694c32ca1e120e988012b7ecd74f625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)在图2中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfddba15eea41271e929114b41cc317.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2694c32ca1e120e988012b7ecd74f625.png)
![](https://img.xkw.com/dksih/QBM/2021/6/23/2749311833456640/2751153970397184/STEM/c7b561a5-447a-4aaf-b46c-7bd04033dcde.png)
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【推荐2】在平面直角坐标系中,点A的坐标为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/3e17a482-7de8-4537-8395-02de4ec82c3d.png?resizew=425)
(1)如图1,当
时,若点C的坐标为
,
是等腰直角三角形,
,
,直接写出x、y满足的数量关系式.
(2)如图2,E为y轴负半轴上一点,且
,C为第一象限内一点,
,且
,直线EC交x轴于点H,求
的值;
(3)如图3,当
时,在
中,
,若
,求
长.(用含m的式子表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e375867376c669a8ec5aa26dc8a77e2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/3e17a482-7de8-4537-8395-02de4ec82c3d.png?resizew=425)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df96f9f516c37a434eb2730afba1306a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b6e4a2df58a236c20df5df0d29a466c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
(2)如图2,E为y轴负半轴上一点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b04b73200fbec6a89974c251d680494.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfc77a9036210db5975da0545b41866c.png)
(3)如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22a688b51f4862f610d3064199aeb336.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f690954d171bd324c936098676db5c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c21350a49d9229ef239253f7c3d366ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
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