如图,等边
的边长为3,点P是边
上一点,过点P作
于点E,Q为
延长线上一点,连接
交
边于点D,当
时,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bc56fdf70e65bd88980c64af96b83da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51dfab0c1ec275ff83d08c7293968c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/19/ee238b5b-adcb-4647-a0c4-85f67a175bbc.png?resizew=163)
A.![]() | B.![]() | C.![]() | D.不能确定 |
更新时间:2023-11-19 15:56:26
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【推荐1】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等角的补角相等;
④垂直于同一条直线的两条直线互相平行;
⑤从直线外一点到这条直线的垂线段,叫做这点到这条直线的距离,其中真命题的个数为 ( )
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等角的补角相等;
④垂直于同一条直线的两条直线互相平行;
⑤从直线外一点到这条直线的垂线段,叫做这点到这条直线的距离,其中真命题的个数为 ( )
A.1 | B.2 | C.3 | D.4 |
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【推荐2】如图,点E在AC的延长线上,若BD∥AE,则下列结论错误的是( )
A.∠3=∠4 | B.∠1=∠2 |
C.∠D=∠DCE | D.∠D+∠ACD=180° |
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【推荐1】如图所示,有一个角为30°直角三角板放置在一透明的长直尺上,若∠2=15°,则∠1度数为( )
![](https://img.xkw.com/dksih/QBM/2020/5/13/2461654097231872/2461992923242496/STEM/ec694275147e4b248bac0ae2dda11858.png?resizew=176)
![](https://img.xkw.com/dksih/QBM/2020/5/13/2461654097231872/2461992923242496/STEM/ec694275147e4b248bac0ae2dda11858.png?resizew=176)
A.85° | B.75° | C.65° | D.45° |
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【推荐2】如图,将一个长方形纸条折成如图的形状,若已知
,则∠2为( )
![](https://img.xkw.com/dksih/QBM/2022/5/2/2970657047158784/2971432232574976/STEM/60c86c8a-9fc7-4035-a9b9-e425969214c2.png?resizew=108)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12958f1922a2daa129ae83c7977c38f4.png)
![](https://img.xkw.com/dksih/QBM/2022/5/2/2970657047158784/2971432232574976/STEM/60c86c8a-9fc7-4035-a9b9-e425969214c2.png?resizew=108)
A.125° | B.124° | C.122° | D.116° |
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【推荐1】在平面直角坐标系中,如图所示正方形
,点
在
上,将正方形
绕坐标原点O顺时针旋转,每次旋转
,则第2023次旋转结束时,点D的坐标是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/730f783fd11809826834d73585201d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,
,且
.
,
是
上两点,
,
.若
,
,
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/2019/5/14/2203374470209536/2203554591047680/STEM/13997248cab84f4f90acfbf7b63edf6a.png?resizew=125)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77e3c1c236141d6118429fade0a9b9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497846628a41a9bc750a645e045afb47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b9d0c688e55286443c9974797fc647f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8832c5450a61500ccbf73d95e16f449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6402c0f9eecfcdf73f9e87ca82a6f2c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeedb5f361a1baff6338436fff6c471d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2019/5/14/2203374470209536/2203554591047680/STEM/13997248cab84f4f90acfbf7b63edf6a.png?resizew=125)
A.3 | B.4 | C.5 | D.6 |
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【推荐1】如图,等腰△ABC中,AB=AC,∠BAC=120°,AD⊥BC于点D,点P是BA延长线上一点,点O是线段AD上一点,OP=OC,下面的结论:①∠APO+∠DCO=30°;②△OPC是等边三角形;③AC=OD+AP;④S△ABC=S四边形AOCP,其中正确的结论有( )个
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/21/e5072104-fb26-478d-a982-14243b519631.png?resizew=143)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/21/e5072104-fb26-478d-a982-14243b519631.png?resizew=143)
A.0 | B.1 | C.2 | D.3 |
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【推荐2】两个边长为2的正六边形按如图所示方式放置,则点A的坐标是( )
A.![]() | B.(3,4) | C.![]() | D.![]() |
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