已知:如图,AB、CD、EF三条直线交于点O,且OE⊥AB,∠COE=20°,OG平分∠BOD,则∠BOG的度数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/26/60422431-dd45-4d9b-869f-b00c6f252a2c.png?resizew=190)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2019-08-11 17:48:54
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【推荐2】如图,
,
交
于点
,
平分
,
,则
的度数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adcae9d00980803e5955228d1e217abe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16b2d10c6c83e4b35f7eec351c0369f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bc8e2603041306dfaeeb88f7fdd40c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】下列说法中正确的是( )
A.两条直线被第三条直线所截,同位角相等 |
B.经过直线外一点有且只有一条直线与已知直线平行 |
C.同旁内角相等,两直线平行 |
D.如果两个角不是对顶角,那么它们一定不相等 |
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【推荐2】如图,在
中,
,
,垂足分别为D、E,
、
交于点H,已知
,
,则
的长是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/2260353f-aa61-42a4-80d9-9da5e04b7fc2.png?resizew=179)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f913298f0fae9f55377a8deab9f099dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9cdd315c8c0508ad4ec16df1abb73ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070bc896d35495237fd65576e9b6f88e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/2260353f-aa61-42a4-80d9-9da5e04b7fc2.png?resizew=179)
A.4 | B.5 | C.1 | D.2 |
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【推荐1】如图,已知直线AB,CD相交于点O,OA平分∠EOC,∠EOC=70°,则∠BOD=( )
![](https://img.xkw.com/dksih/QBM/2022/7/14/3028892271149056/3080461420789760/STEM/dc11384813cd47aca6c5fa05bd42636d.png?resizew=115)
![](https://img.xkw.com/dksih/QBM/2022/7/14/3028892271149056/3080461420789760/STEM/dc11384813cd47aca6c5fa05bd42636d.png?resizew=115)
A.35° | B.40° | C.55° | D.70° |
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【推荐2】有下列四个命题:①相等的角是对顶角;②两条直线被第三条直线所截,同位角相等;③同一种四边形一定能进行平面镶嵌;④垂直于同一条直线的两条直线互相平行.其中真命题的个数为( )
A.1 | B.2 | C.3 | D.4 |
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