如图,将一平行四边形纸片沿着虚线EF剪成两个全等的梯形纸片,点E,F分别在边AD,BC上. AB=5, AD=10,tan∠BAD=
,∠AEF=45°,则AE的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/f6db1145-5938-4867-baa2-120dbdd99485.png?resizew=241)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/f6db1145-5938-4867-baa2-120dbdd99485.png?resizew=241)
A.1.5 | B.7 | C.8 | D.8.5 |
更新时间:2020-09-17 14:44:50
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【推荐1】如图,四边形
是平行四边形,
,则四边形
的面积是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/cc4d4ed5-9bce-48aa-b04f-1f878c2c28fe.png?resizew=146)
A.9 | B.11 | C.13 | D.15 |
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【推荐2】如图,在平行四边形
中,
平分
,交
于点
,
平分
,交
于点
,
,
,则
长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
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A.11 | B.14 | C.9 | D.10 |
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【推荐1】小明家的花洒的实景图及其侧面示意图分别如图1、图2所示,花洒安装在离地面高度160厘米的
处,花洒
的长度为20厘米.已知花洒与墙面所成的角
,当花洒喷射出的水流
与花洒
成
的角时,水流喷射到地面的位置点
与墙面的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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A.![]() | B.200厘米 | C.![]() | D.170厘米 |
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【推荐2】如图,在
中,
,将点C沿
折叠至点E,连接
,当
从
变化过程中,四边形
恰为平行四边形时,此时四边形
的周长是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
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A.![]() | B.16 | C.14 | D.![]() |
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【推荐1】如图,在△ABC中,∠C=90°,AB=12,tanB=
.以点A为圆心,任意长为半径画弧分别交AB、AC于点M、N,再分别以点M、N为圆心,大于
MN的长为半径画弧,两弧交于点P,连接AP并延长交BC于点D,则△ACD的周长为( )
![](https://img.xkw.com/dksih/QBM/2017/10/11/1799325558177792/1810897539678208/STEM/b97ccbb323474544b2fc8ad30d1972d2.png?resizew=114)
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A.12 | B.12![]() | C.6+6![]() | D.6+9![]() |
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【推荐2】如果∠A是锐角,则下列结论正确个数为( )个.
①![](https://img.xkw.com/dksih/QBM/2015/3/3/1573806153940992/1573806159699968/STEM/ca85d1d470ae42999946379ed92ca244.png)
②sinA+cosA>1
③tanA>sinA
④cosA=sin(90o-∠A)
①
![](https://img.xkw.com/dksih/QBM/2015/3/3/1573806153940992/1573806159699968/STEM/ca85d1d470ae42999946379ed92ca244.png)
②sinA+cosA>1
③tanA>sinA
④cosA=sin(90o-∠A)
A.1 | B.2 | C.3 | D.4 |
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