如图,在
中,
,D为
的中点.若
,则
是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86cc0b6f5748fb58042339b4b563bc07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246a86f34603eaf2e6a948681b831b0d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/29/2b3cfdf3-7721-4b7a-a9bd-b328065ea625.png?resizew=108)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-06-17 23:11:26
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【推荐1】如果一个等腰三角形的一个角为30º,则这个三角形的顶角为( )
A.120º | B.30º | C.120º或30º | D.90º |
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【推荐2】如图,在四边形ABCD中,AB=CD,连接BD,且
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![](https://img.xkw.com/dksih/QBM/2022/7/8/3018025066012672/3018992436027392/STEM/95963f17fbda4650bc68c65833c6ede1.png?resizew=179)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4dd6e7c88601b4c50b06f1238fdd95d.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,线段AB=1,点P是线段AB上一个动点(不包括A、B)在AB同侧作Rt△PAC,Rt△PBD,∠A=∠D=30°,∠APC=∠BPD=90°,M、N分别是AC、BD的中点,连接MN,设AP=x,MN2=y,则y关于x的函数图象为( )
![](https://img.xkw.com/dksih/QBM/2019/8/7/2263797947817984/2264549186936832/STEM/5dc48579cf034007a5143e5f7166a2e1.png?resizew=158)
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A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】如图,在
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①
; ②
; ③
; ④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0cf85915bdd25319de8f8b464bc59fd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/5/a4243e77-883f-4453-80fa-d2c737fd10ab.png?resizew=186)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b929269c53a44907dba8ee298a0a522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f913298f0fae9f55377a8deab9f099dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de5d99a756a8bdeec1333f55b20fe465.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34323137ddb894a70d97511aa5fe6f98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c52853ab023f9270c6583c381baa885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0cf85915bdd25319de8f8b464bc59fd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/5/a4243e77-883f-4453-80fa-d2c737fd10ab.png?resizew=186)
A.①②③④ | B.①②④ | C.①② | D.②③ |
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