如图所示,用构图法可以较简便地计算出
的值,请你仿照这种方法,求出
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccefdea6639a9755ed310d0afec2f6cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0846e8e420421c94516b0d5f3eadcfc.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-05-22 22:05:53
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【推荐1】如图,在
中,
,
,
,点P是
边上的动点,则
的长不可能是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
A.6 | B.8 | C.10 | D.13 |
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【推荐2】已知等边△ABC的边长为8,点P是边BC上的动点,将△ABP绕点A逆时针旋转60°得到△ACQ,点D是AC边的中点,连接DQ,则DQ的最小值是( )
A.![]() | B.4 | C.![]() | D.不能确定 |
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【推荐1】如图,
为
的中线,将
沿着
翻折得到
,点B的对应点为E,
与
相交于点F,连接
,则下列结论一定正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/4/29/2710257776001024/2710304870588416/STEM/783400d2-1dc9-4900-8671-1f4f9448cb5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/2021/4/29/2710257776001024/2710304870588416/STEM/783400d2-1dc9-4900-8671-1f4f9448cb5f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,已知AB=AC,PB=PC,给出下面结论:①BP=CP,②EB=EC,③AD⊥BC,④EA平分∠BEC,其中正确的结论有( )
![](https://img.xkw.com/dksih/QBM/2019/11/1/2324581539135488/2325691972116480/STEM/d8268e002156476195270e704cff6545.png?resizew=87)
![](https://img.xkw.com/dksih/QBM/2019/11/1/2324581539135488/2325691972116480/STEM/d8268e002156476195270e704cff6545.png?resizew=87)
A.①②④ | B.①③④ | C.①②③ | D.①②③④ |
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【推荐1】如图在平面直角坐标系中,直线
过点
的半径为
于点P,
切
于点
,那么切线长
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6916bdad1cccd4e8216dd9a77d8de40f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f12bda214217354638b99ea9dd0c30f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
A.![]() | B.![]() | C.3 | D.![]() |
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【推荐2】如图,平面直角坐标系中,
,
,
,将
绕点A顺时针旋转,当点C的对应点D恰好落在y轴正半轴上时,点B的对应点E恰好落在双曲线
图像上,则k的值为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a18a7caa080988802ba1145b4fe4203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c850811ba59a05e945a665196539a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40dff4bbd58a9c17e0e4994e91dfb2b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/11/603f2ef4-5eb9-4b29-be87-13f9a487af14.png?resizew=164)
A.![]() | B.-3 | C.![]() | D.-6 |
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【推荐1】如图,已知E是正方形
中
边延长线上一点,且
,连接
和
,
与
交于点N,F是
的中点,连接
交
于点M,连接
.有如下结论:①
;②
;③
;④
.其中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/2/a6cc17ad-f46f-4e4e-9205-26c85ef41d8f.png?resizew=210)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e92f48e9bfe12d145f7d2a2f0360d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee0fc7eed80f5d659e4bcecae5bb9327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ad1e27043b90b9373270b9ea82199bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6836a8b222947238b02bd2bac37232e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef93e956be69ba8ba52935b591fa0ff9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/2/a6cc17ad-f46f-4e4e-9205-26c85ef41d8f.png?resizew=210)
A.①②③ | B.①③④ | C.①②④ | D.②③④ |
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【推荐2】如图,在四边形
中,
,以
为圆心,
为半径的弧恰好与
相切,切点为
.若
,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/014d97ca1baea8247a0b458224e32052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e22f32a69bdaea6d29020e8e558cc0d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32e2f2d7147cf1699fbfdef9cf4af74.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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