如图,将边长为8的等边
置于平面直角坐标系中,点
在
轴正半轴上,过点
作
于点
,将
绕着原点
逆时针旋转
得到
,这时,点
恰好落在
轴上.若动点
从原点
出发,沿线段
向终点
运动,动点
从点
出发,沿线段
向终点
运动,两点同时出发,速度均为每秒1个单位长度.设运动的时间为
秒.
(1)请直接写出点A、点D的坐标;
(2)当
的面积为
时,求
的值;
(3)设
与
相交于点
,当
为何值时,
与
相似?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1415e415ec7678b962af22b752faeea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/771b610e4ddefa739a985d1e5462ce5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07280e7bf72dce0cf62a48daf0e2a80e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfc5ceed613776047cb83746b7a3fe6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(1)请直接写出点A、点D的坐标;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926b737b11722b88fd40fc8eef8ecba1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ca820a456491348e72587e4fe10bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.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/2c4db72078b1966135c24dbf19590529.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfc5ceed613776047cb83746b7a3fe6e.png)
更新时间:2017-12-21 21:41:11
|
相似题推荐
解答题-作图题
|
较难
(0.4)
【推荐1】(1)在如图所示的平面直角坐标系中描出下列各组的点:
①
,
;②
,
;
③
,
;④
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3b22d7375a11f4ae37e92d9e4ce15fb.png)
(2)分别连接线段
,
,
,
,并直接写出各线段中点的坐标;
(3)仔细观察各中点的坐标与两个端点的坐标的关系,若点
,
,
则线段
的中点
的坐标为______.(请用含字母
,
,
,
的代数式表示)
(4)如图,平面直角坐标系
中,
的边
在x轴上,对角线
,
交于点M,函数
的图象经过点
和点M.
①求k的值和点M的坐标;
②求
的周长.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8950c7bc835103d52ceffab14b6b31a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f36488f7dff759ace2a27e56c3857056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a9f0bc0ceefba89d76aed7d16f9f287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6ddfee4b217e111f22c431719b6bf0c.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e53620f1591c672eeed905ada620c74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca9f183276afe73da1d8751470b7edc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f560485d6fe79e17b80c78c01aaf178a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3b22d7375a11f4ae37e92d9e4ce15fb.png)
(2)分别连接线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa29fe6cd9eb51c184f6299d437375cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
(3)仔细观察各中点的坐标与两个端点的坐标的关系,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ecae82fb8965c046b0b5e7842e00da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06d44c93a48335b675545ab5a3933d05.png)
则线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea74bcb2642f3bdeb0f6d67b5baca43a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.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/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
(4)如图,平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2beb91f10d2d8f2aa0dcc3f5cd1598.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f3fbb2fdd9b947f14e047f3210d6ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6967ebd791092c62b4ef97924d91883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d62e8aadaadebf1454fde21a390ebdea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c9940526785ca763da2dfa35e77c934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9576c9c6dd72e7832591f7a0b22fea04.png)
①求k的值和点M的坐标;
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f3fbb2fdd9b947f14e047f3210d6ff.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/19/c04a3fa4-e6c8-4441-ad80-c5eb1fcf9630.jpg?resizew=381)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,A(m,0),B(0,n),以B点为直角顶点在第二象限作等腰直角△ABC.
(1)求C点的坐标.
(2)在y轴右侧的平面内是否存在一点P,使△PAB与△ABC全等?若存在,求出P点坐标,若不存在,请说明理由.
(1)求C点的坐标.
(2)在y轴右侧的平面内是否存在一点P,使△PAB与△ABC全等?若存在,求出P点坐标,若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2019/11/4/2326672878133248/2327526007447552/STEM/58e7b41634734c7b9032a6d4425e5fed.png?resizew=381)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图所示,△ABC是等边三角形,菱形DEFG的顶点D是BC边上的一个点,若菱形的内角∠DEF=60〫,点E、G分别在AB、AC的延长线上,连接AF.
![](https://img.xkw.com/dksih/QBM/2022/6/25/3009173264572416/3071377021599744/STEM/844ea35d67c64bf69360216a921e76c9.png?resizew=153)
(1)求证:△DBE≌△GCD;
(2)求证:AF平分∠BAC;
(3)若BD=2CD,求
的值.
![](https://img.xkw.com/dksih/QBM/2022/6/25/3009173264572416/3071377021599744/STEM/844ea35d67c64bf69360216a921e76c9.png?resizew=153)
(1)求证:△DBE≌△GCD;
(2)求证:AF平分∠BAC;
(3)若BD=2CD,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be0286d0c84b5d2c87158aa2e90ef964.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】已知,
为等边三角形,点D在边
上.
为一边作等边三角形
,连接
.请直接写出
之间的关系.
【迁移运用】如图2,点F是
边上一点,以
为一边作等边三角
.求证:
.
【类比探究】如图3,点F是
边的延长线上一点,以
为一边作等边三角形
.试探究线段
三条线段之间存在怎样的数量关系,请写出你的结论并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce31a6926224dd7ce32ab8c2d52dd352.png)
【迁移运用】如图2,点F是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c1e02e0541a1dbc4c4e0316a3a2c90.png)
【类比探究】如图3,点F是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d03e9f4ff56a5df61c07f0fbc6f61025.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐3】如图1,Rt△ABC中,∠ACB=90°,D为AB的中点,∠EDF=90°,DE交AC于点G,DF经过点C.
![](https://img.xkw.com/dksih/QBM/2016/9/28/1574244609146880/1574244615036928/STEM/54672418496f46448d8fe210280dc83e.png)
(1)若∠B=60°.
①求∠ADE的度数;
②如图2,将图1中的∠EDF绕点D顺时针方向旋转角α(0°<α<60°),旋转过程中的任意两个位置分别记为∠E1DF1,∠E2DF2,DE1交直线AC于点P,DF1交直线BC于点Q,DE2交直线AC于点M,DF2交直线BC于点N,求
的值;
(2)将(1)问中的“若∠B=60°”改为“∠B=β(60°<β<90°)”,其余条件不变,判断
的值是否为定值,如果是,请直接写出这个值(用含β的式子表示);如果不是,请说明理由.
![](https://img.xkw.com/dksih/QBM/2016/9/28/1574244609146880/1574244615036928/STEM/54672418496f46448d8fe210280dc83e.png)
(1)若∠B=60°.
①求∠ADE的度数;
②如图2,将图1中的∠EDF绕点D顺时针方向旋转角α(0°<α<60°),旋转过程中的任意两个位置分别记为∠E1DF1,∠E2DF2,DE1交直线AC于点P,DF1交直线BC于点Q,DE2交直线AC于点M,DF2交直线BC于点N,求
![](https://img.xkw.com/dksih/QBM/2016/9/28/1574244609146880/1574244615036928/STEM/c480eb9cbbf14fdcb2dcefab631eb4ce.png)
(2)将(1)问中的“若∠B=60°”改为“∠B=β(60°<β<90°)”,其余条件不变,判断
![](https://img.xkw.com/dksih/QBM/2016/9/28/1574244609146880/1574244615036928/STEM/6483f7e3929747438bbdbd966196b6ba.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐1】如图,二次函数
的图像与坐标轴分别交于点
、
、
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/4/51ecb140-4b72-4c20-88a9-2694ea593c7c.jpg?resizew=116)
(1)求二次函数表达式;
(2)在第二象限内,线段
上有一点
,作
平行于
轴,交二次函数图像于点
、
(点
在
轴左侧),作点
与点
关于
轴对称.
①证明:四边形
为平行四边形;
②若
是以
为斜边的直角三角形,求点
的横坐标;
③直角坐标系内存在点
,使得四边形
为平行四边形,请直接写出
与
的函数表达式,并求当线段
的长度最大时,点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70a31bc26ae2a56d4d19789fd3c03ac1.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aabc0c09bbd8e947818b688c5522a70f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8483716cbca039fc01c24104b59173dd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/4/51ecb140-4b72-4c20-88a9-2694ea593c7c.jpg?resizew=116)
(1)求二次函数表达式;
(2)在第二象限内,线段
![](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/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/d053b14c8588eee2acbbe44fc37a6886.png)
①证明:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d5e1fb25f64554171a4a4aaf03c7740.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a1eda00fc2d64ce3a42004b24adf00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
③直角坐标系内存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad6fd4d22c1e2c564bf2bdc5ae894de7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d32c88c67d9a061d5ce7743d97c6d7d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
真题
【推荐2】综合运用
如图1,在平面直角坐标系中,正方形
的顶点A在
轴的正半轴上,如图2,将正方形
绕点
逆时针旋转,旋转角为
,
交直线
于点
,
交
轴于点
.
(1)当旋转角
为多少度时,
;(直接写出结果,不要求写解答过程)
(2)若点
,求
的长;
(3)如图3,对角线
交
轴于点
,交直线
于点
,连接
,将
与
的面积分别记为
与
,设
,
,求
关于
的函数表达式.
如图1,在平面直角坐标系中,正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447bdb83bb93996f9acb0c2abc4b6b10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/1/f96cacd5-dee8-47c6-9456-a06098d23ba9.png?resizew=471)
(1)当旋转角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83b723421b10b3735be77e1c79fa1425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf2e3236ea30ee2c37928b98041f13a.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/753f70f89ee9f98bbb12c866087d1be1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
(3)如图3,对角线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1460aa3d83df61f6c411b34412135451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b6e0df8ad8998b75cabd2ad7eeaefd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20bb77c849e0ce2a7d06ff0ca900fb28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e450316d80c6525899fd8e41d7116ef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc268d27f636e3417a64ad34c96a1a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次