如图,
,
,
,则
( )度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39a2219f1a1df03f9722135fc873cddf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e812b1220ac189c9563a4fcb3c2950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6217ba54baf35aca59d9b89ded7367e.png)
A.150 | B.130 | C.120 | D.100 |
更新时间:2023-05-08 08:39:24
|
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【推荐1】下列说法中正确的是
A.相等的角是对顶角 | B.同位角相等,两直线平行 |
C.同旁内角互补 | D.两直线平行,对顶角相等 |
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【推荐2】如图所示,下列推理及括号中所注明的推理依据错误的是( )
A.∵∠2=∠4,∴AD![]() |
B.∵AB![]() |
C.∵∠DAM=∠CBM,∴AD![]() |
D.∵AD![]() |
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名校
【推荐1】如图,∠BDC=100°,∠C=35°,∠A=28°,则∠B的度数是( )
![](https://img.xkw.com/dksih/QBM/2022/1/14/2894496050225152/2973636083744768/STEM/6c94d1ac58294b21a7cbc0c4ba4bac53.png?resizew=139)
![](https://img.xkw.com/dksih/QBM/2022/1/14/2894496050225152/2973636083744768/STEM/6c94d1ac58294b21a7cbc0c4ba4bac53.png?resizew=139)
A.43° | B.33° | C.47° | D.37° |
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【推荐2】“三等分角”大约是在公元前五世纪由古希腊人提出来的.借助如图所示的“三等分角仪”能三等分任一角.这个三等分角仪由两根有槽的棒
,
组成,两根棒在
点相连并可绕
转动,
点固定,
,点
,
可在槽中滑动,若
,则
的度数是( )
![](https://img.xkw.com/dksih/QBM/2021/7/9/2760415369068544/2778358755221504/STEM/b1034f43-f09a-4b14-9377-c1f5ee97927f.png)
![](https://img.xkw.com/dksih/QBM/2021/7/9/2760415369068544/2778358755221504/STEM/e9f81710-3bb4-4fee-9af2-a4449688f3a2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3573dba6bb93d633b1deb6848b21228c.png)
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![](https://img.xkw.com/dksih/QBM/2021/7/9/2760415369068544/2778358755221504/STEM/b1034f43-f09a-4b14-9377-c1f5ee97927f.png)
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A.62° | B.67° | C.76° | D.82° |
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