如图,直线
和
相交于点
,
平分
,
,
是垂足,已知
,则
的度数是( )
![](https://img.xkw.com/dksih/QBM/2021/5/14/2720942013087744/2789528989958144/STEM/ab1c866e-693f-4a98-bfcf-88e61df574bb.png?resizew=269)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f91270ddbe1cf3c1362e1b95aee14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc2eaf2acb7e954cc0c4aacdc1f29f34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/618ede24ca37aa33a3789867be8f66b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21a52e349973e2c589b48066c9068a8e.png)
![](https://img.xkw.com/dksih/QBM/2021/5/14/2720942013087744/2789528989958144/STEM/ab1c866e-693f-4a98-bfcf-88e61df574bb.png?resizew=269)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2021-08-19 14:14:10
|
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【推荐1】已知射线OC在∠AOB的内部,下列关系式
①∠AOC=∠BOC;②∠AOC+∠BOC=∠AOB;③∠AOB=2∠AOC;④∠BOC=
∠AOB.其中,能说明OC为∠AOB的平分线的有( )
①∠AOC=∠BOC;②∠AOC+∠BOC=∠AOB;③∠AOB=2∠AOC;④∠BOC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】如图,直线
,
平分
,
,则
的度数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e37b078d02601f76f0f8320b410809f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13ae849142a1bd9534b72723c8d1b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐1】下列说法正确的是
A.用两根钉子固定一根木条,体现数学事实是两点之间线段最短 |
B.不相交的两条直线叫做平行线 |
C.过平面内一点有且只有一条直线与已知直线垂直 |
D.过一点有且只有一条直线与已知直线平行 |
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【推荐2】如图,已知
中,
,
平分
,
,垂足为D,E为
上一点,
.则
的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/6e6eedb4-610e-41a1-a5f1-6bb7178c67c5.png?resizew=254)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84494e057cb7bc129257c4cb962678ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93380ab8eccc6e6f11bdf19ffc2d4cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105068b25f5a63af32f4082cfe08691e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3e081637bcea5368cc72370bae283b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/6e6eedb4-610e-41a1-a5f1-6bb7178c67c5.png?resizew=254)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】下列命题:①对顶角相等;②在同一平面内,垂直于同一条直线的两直线平行;③如果两个角相等,那么它们的余角也相等;④同位角相等.其中错误的有( )
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】如图,
与
交于点
,
.下列说法错误的是( )
![](https://img.xkw.com/dksih/QBM/2020/6/13/2484008816574464/2491421650280448/STEM/e236a05d106748a4a0f771138297b5ae.png?resizew=167)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/178e3fa2e4de57a4c067e79be7d798e7.png)
![](https://img.xkw.com/dksih/QBM/2020/6/13/2484008816574464/2491421650280448/STEM/e236a05d106748a4a0f771138297b5ae.png?resizew=167)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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