如图,在平面直角坐标系
中,三角板的直角顶点P的坐标为
,三角板绕点P在坐标平面内旋转,一条直角边与x轴的正半轴交于点A,另一直角边与y轴交于点B.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/18/ed2cd83b-2572-49c3-b102-2f8a118ac458.jpg?resizew=611)
(1)连接
,请判断
是什么三角形,并说明理由.
(2)在三角板绕点P旋转的过程中,
是定值吗?若是,请求出定值;若不是,请说明理由.
(3)当
为等腰三角形时,请直接写出所有满足条件的点B的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee74bec70d68998ec523fa5812760336.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/18/ed2cd83b-2572-49c3-b102-2f8a118ac458.jpg?resizew=611)
(1)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
(2)在三角板绕点P旋转的过程中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/275c4dc4b6c9f95820ef6fe62a53facd.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e534b545e86c02abd2a0dc75d32b407.png)
更新时间:2023-02-10 17:06:16
|
相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】如图,在平面直角坐标系中,
,
,
.
与
关于
轴对称,点
的对应点分别是
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/8/405cc9e2-fe8f-4d03-9024-93807fdc772e.png?resizew=260)
(1)作
关于
轴对称的
.
(2)
是
轴上一点,求作
,使得
的周长最小,并直接写出点
的坐标.(不写作法,保留作图痕迹)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b7a34134d1f417991d64aa3e14add9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b43f15b238c4f8415b9c5f12523ff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5ef2ab2ef7214a078ae7537693be8a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce7af7c5df749c6fa9bbe87faa72c66d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/8/405cc9e2-fe8f-4d03-9024-93807fdc772e.png?resizew=260)
(1)作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
(2)
![](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/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
名校
【推荐2】如图,在平面直角坐标系中,
三个顶点的坐标分别为
.
![](https://img.xkw.com/dksih/QBM/2022/11/13/3108847963832320/3110735902736384/STEM/dea32f8583dd48bd87198fb25a283a89.png?resizew=190)
(1)在图中画出
关于y轴的对称图形
;(要求:画出三角形,标出相应顶点的字母)
(2)分别写出
三个顶点的坐标,并计算
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be05a592c5a148eb5eb9a772e3461fe0.png)
![](https://img.xkw.com/dksih/QBM/2022/11/13/3108847963832320/3110735902736384/STEM/dea32f8583dd48bd87198fb25a283a89.png?resizew=190)
(1)在图中画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)分别写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】已知:
中,
,
.
(1)求证:
;
(2)连接
,当
时,在不添加任何辅助线和字母的情况下,请直接写出图中与
互补的角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4388f8dbb718da77cd86245dd3a1854.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e2e1083b773e16d1e385072652f7319.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/27/ac2d42af-2b71-4eb4-94b7-7257a5d6e841.png?resizew=305)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f7f27111303c38eaf43bf547e460a33.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38d97f03faed3152db2fd3bd1919944.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】在
和
中,
,
,
,连接
,
.
【发现问题】如图①,若
,延长
交
点D,则
与
的数量关系是_________,
的度数为_________.
【类比探究】如图②,若
,延长
,
相交于点D,请猜想
与
的数量关系及
的度数,并说明理由.
【拓展延伸】如图③,若
,且点B,E,F在同一条直线上,过点A作
,垂足为点M,请猜想
,
,
之间的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38d97f03faed3152db2fd3bd1919944.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715e51056bd297900628b0d565e00777.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/4635f7de-e15d-4284-8eef-f833c11290fd.png?resizew=518)
【发现问题】如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab926d89b65f26c12e3da73ef1e5cf68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a72dfbf0138a611174c36ce077e0c47.png)
【类比探究】如图②,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fffa3d9c32da53b0ea0c338012ea20c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a72dfbf0138a611174c36ce077e0c47.png)
【拓展延伸】如图③,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/396632dba26d326a6b69f0bb7016bd14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】问题发现:(1)如图1,在
中,
分别在
上,若
,则
和
是顶角相等的等腰三角形,连接
,则
的数量关系是_______,
的数量关系是________.
拓展探究:(2)如图2,
和
均为等边三角形,点
在同一直线上,连接
.试求
的度数及线段
之间的数量关系.
解决问题:(3)如图3,
和
均为等腰直角三角形,
,点
在同一直线上,
为
中
边上的高,连接
.试求
的度数及线段
之间的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f785e5f5bd2afcde4d8342c129cac095.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e675a92cad72c65aa4071b9d9e226090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eaffcd2070bfcb1955e2cab66c26c06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c41663d9e5e18891475aeaa98794f33d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e88ee337b7c9082f4fe84fd1752d55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e4ac36776c96182950542d0719d1ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b0a3fa475b24f57ecd79c681259561.png)
拓展探究:(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb4817f6d025306bfcba653b4e8d4dc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a55a1a244f81097e05e715b69580faa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b0a3fa475b24f57ecd79c681259561.png)
解决问题:(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc75953bf5dcfa4af308c34bf9952d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb4817f6d025306bfcba653b4e8d4dc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a55a1a244f81097e05e715b69580faa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a4d33c513b5ecd9a9743047afe4062.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/b5732f84-1371-4b4a-b810-92d451ccf071.png?resizew=536)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在
中,
,
平分
交
于点O,以O为圆心,
的长为半径作
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/17/f74c8f6e-0f5d-46fa-8b19-519b7009d2a4.png?resizew=135)
(1)求证:
是
的切线;
(2)在
上取一点D使得
,连接
,若
,
,求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/17/f74c8f6e-0f5d-46fa-8b19-519b7009d2a4.png?resizew=135)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce45423dfd04d1eda929510c46979456.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,Rt△ABC中,∠BAC=90°,将△ABC绕点A顺时针旋转得到△AED,且点D在边BC上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/28/0e60b0e8-8f06-4dc9-ad67-c1bd50351c09.png?resizew=153)
(1)若∠DAC=50°,则∠ABE= 度;
(2)求证:BE⊥BC:
(3)若点D是BC的中点,AC=2,求BE的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/28/0e60b0e8-8f06-4dc9-ad67-c1bd50351c09.png?resizew=153)
(1)若∠DAC=50°,则∠ABE= 度;
(2)求证:BE⊥BC:
(3)若点D是BC的中点,AC=2,求BE的值.
您最近一年使用:0次