直线
相交于点
,若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28d2790a97390935125aa897417f970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7491ecb7687bc544f9361cbcde4e2c38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d14c83f23e14c7d64a787cbad80c22b.png)
![](https://img.xkw.com/dksih/QBM/2021/9/22/2813629356498944/2813751744077824/STEM/6a2e7784-f683-484c-981f-d3cdb0d5c959.png)
更新时间:2021-09-22 19:35:29
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相似题推荐
解答题-证明题
|
较易
(0.85)
【推荐1】补全下列推理过程:
已知:如图,已知
,请说明
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/8be7d68a-0215-41ef-94d1-07125e0f5bfa.png?resizew=134)
证明:∵
( )
∴
( )
∴
( )
又∵
(已知)
∴
( )
∴
( )
∴
( )
∵
(已知)
∴
(垂直的定义)
∴
.(垂直的定义)
已知:如图,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4fd0876619a8e9754b3cc07d5019a1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f2a245381e615882ee5feb7793a1df6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/8be7d68a-0215-41ef-94d1-07125e0f5bfa.png?resizew=134)
证明:∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb570ae4f92277a0ece9a4b449bd4f9b.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002cc6a0373255f39172cdee62fb6b39.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e50ce9ef89a466df68124a1dccff5663.png)
又∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d1717b5311ed602f1730e86d9322647.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df4d67aa2a39c15abaa0cbc09432f1fb.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d888c0b616792a2c41ff180de99fbb.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dccadb21cc9e748f4f570e79d26a9d73.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05dbd3592cbe9d7298a30f19c20c5a8e.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f2a245381e615882ee5feb7793a1df6.png)
您最近一年使用:0次
解答题-作图题
|
较易
(0.85)
【推荐2】如图,直线
相交于点O.
的度数比
的度数的2倍还要大
,过点O作
,射线
平分
,射线
在
的内部,且满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/4/7d74d142-cbdc-49db-a860-ce7688180e39.png?resizew=160)
(1)求
的度数;
(2)用圆规和直尺,作出射线
;(要求:不写作法,保留作图痕迹)
(3)
与
_________垂直(填“是”或“否”).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28d2790a97390935125aa897417f970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e7b8a59f8d66176463f3d71f882a26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f91270ddbe1cf3c1362e1b95aee14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/178e3fa2e4de57a4c067e79be7d798e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f91270ddbe1cf3c1362e1b95aee14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2460507a462453e084eaf70a7d867e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f617f96e54f79035b88667dad3be2478.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/4/7d74d142-cbdc-49db-a860-ce7688180e39.png?resizew=160)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8fcb724077877f54bf6fbad57b86c08.png)
(2)用圆规和直尺,作出射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
您最近一年使用:0次
解答题-作图题
|
较易
(0.85)
名校
【推荐2】如图,不在同一直线上的三点A,B,C.
![](https://img.xkw.com/dksih/QBM/2022/1/7/2896604673458176/2928998820577280/STEM/1f9567ff02eb4a3b986930b8c3c81059.png?resizew=100)
(1)(尺规作图,保留作图痕迹)按下列要求作图;
①分别作直线BC,射线BA,线段AC;
②在线段BA的延长线上作
.
(2)在你所作的图形中,若
,求
的度数.
![](https://img.xkw.com/dksih/QBM/2022/1/7/2896604673458176/2928998820577280/STEM/1f9567ff02eb4a3b986930b8c3c81059.png?resizew=100)
(1)(尺规作图,保留作图痕迹)按下列要求作图;
①分别作直线BC,射线BA,线段AC;
②在线段BA的延长线上作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4558c9d6e035d99512fa6b1533f689c.png)
(2)在你所作的图形中,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed5e30d37c55854a8b479a5204b99cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5157b42da58d55daad27d98b2fec15ff.png)
您最近一年使用:0次