如图,正方形
的顶点O在坐标原点,定点A的坐标为
.
顶点C的坐标为( , )顶点B的坐标为( , );
(2)现有一动点P从C点出发,沿线段
向终点B运动,P的速度为每秒1个单位长度,同时另一动点Q从点A出发沿A→O→C向终点C运动,速度为每秒k个单位长度.设运动时间为2秒时,将三角形
沿它的一边翻折,若翻折前后的两个三角形组成的四边形为菱形,求k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a8b77523fdb650961e4cc870e12180d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
(2)现有一动点P从C点出发,沿线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a718a85add40589bbf788876a755a88e.png)
更新时间:2024-05-26 17:12:17
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解答题-作图题
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【推荐1】如图,△ABC各顶点的坐标分别是A(﹣2,﹣4),B(0,﹣4),C(1,﹣1).
(1)将△ABC向上平移2个单位长度,向右平移3个单位长度,得到△A1B1C1,画出平移后的图形△A1B1C1,并写出平移后△A1B1C1对应顶点的坐标.
(2)求出△ABC的面积S△ABC;
(3)在y轴上是否存在点P,使以A,B,P三点为顶点的三角形满足:S△ABP=2S△ABC,若存在,请求出点P的坐标;若不存在,请说明理由.
(1)将△ABC向上平移2个单位长度,向右平移3个单位长度,得到△A1B1C1,画出平移后的图形△A1B1C1,并写出平移后△A1B1C1对应顶点的坐标.
(2)求出△ABC的面积S△ABC;
(3)在y轴上是否存在点P,使以A,B,P三点为顶点的三角形满足:S△ABP=2S△ABC,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/2020/9/25/2557175866966016/2557575495106560/STEM/47f37919c3664515bb3d11968f9d59af.png?resizew=235)
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【推荐2】(1)如图1,
,
,过点B作
于点C,过点D作
于点E.求证:
.
(2)如图2,等腰
中,
,
,点A是y轴正半轴上的一动点,点B在x轴的正半轴上.以
为直角边在y轴的左边作等腰
,
,连接
,试问A点在运动过程中
与
面积的比值是否会发生变化?如果没有变化,请求出
;若变化,请说明理由.
(3)如图3,在平面直角坐标系
中,点P的坐标为
,点Q为第二象限内任一点.若
是以
为边的等腰直角三角形,请直接写出点Q的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d900531973c546625694146fa1509ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2afe3cea4abdb1b72464d8a1f92db114.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/4ebc713c-f56e-4b48-99bf-6630d42134a7.png?resizew=183)
(2)如图2,等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92609abbb74ebaff4e8cc885e4b8ded7.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e24b3e849e6c421157066216480a53e8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/93cb33b2-5693-4b94-90ec-10add927fa8b.png?resizew=183)
(3)如图3,在平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82be1703fea194fbd9a520f879e16b8a.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/04ff4ac8-f796-41a8-b8ab-553883bc1917.png?resizew=136)
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解答题-证明题
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【推荐1】如图,平行四边形ABCD中,CG⊥AB于点G,∠ABF=45°,F在CD上,BF交CG于点E,连接AE,AE⊥AD.
![](https://img.xkw.com/dksih/QBM/2022/4/8/2953833065365504/2957124469604352/STEM/c682efae-d8e6-4595-98ba-a96a1d53cd29.png?resizew=218)
(1)若BG=1,BC=
,求EF的长度;
(2)求证:AB﹣
BE=CF.
![](https://img.xkw.com/dksih/QBM/2022/4/8/2953833065365504/2957124469604352/STEM/c682efae-d8e6-4595-98ba-a96a1d53cd29.png?resizew=218)
(1)若BG=1,BC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4056761b8f826eeb6ad8c9a151d3c9c.png)
(2)求证:AB﹣
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
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【推荐2】如图,ABCD是矩形纸片,翻折∠B,∠D,使BC,AD恰好落在AC上.设F,H分别是B,D落在AC上的两点,E,G分别是折痕CE,AG与AB,CD的交点.
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(1)求证:四边形AECG是平行四边形;
(2)若AB=8cm,BC=6cm,求线段EF的长.
![](https://img.xkw.com/dksih/QBM/2022/1/2/2892949706203136/2950379312406528/STEM/0bee2009-f6cc-4ec9-95bf-ea712487ddf5.png?resizew=175)
(1)求证:四边形AECG是平行四边形;
(2)若AB=8cm,BC=6cm,求线段EF的长.
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解答题-问答题
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【推荐1】如图1,某小区的大门是伸缩电动门,安装驱动器的门柱是宽度为
的矩形,伸缩电动门中有20个全等的菱形,每个菱形边长为
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解答题-问答题
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【推荐2】如图,矩形
的顶点
分别在
轴的正半轴上,点
在反比例函数
的第一象限内的图像上,
,动点
在
轴的上方,且满足
.
(1)若点
在这个反比例函数的图像上,求点
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(2)连接
,求
的最小值;
(3)若点
是平面内一点,使得以
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/098a3e7d1f1890863b7483a98b618119.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ed9591da55e5561b00b088e6926799.png)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fd3fd878f6189c636fbddd7b218ee77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/994a4ae8ef00018ac1c0f22477d5d1ba.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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