如图,点
为正方形
内部两点,
,若
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/2020/12/15/2614743209689088/2619562379132928/STEM/7d8d3748-b4e1-4476-8a9a-20970b474edd.png?resizew=178)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08cce4450771fab66b1720bdcafa54c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4238435c05fc317641af055ad73d2a1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2020/12/15/2614743209689088/2619562379132928/STEM/7d8d3748-b4e1-4476-8a9a-20970b474edd.png?resizew=178)
A.![]() | B.![]() | C.9 | D.![]() |
更新时间:2021-01-05 13:00:09
|
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【推荐1】如图,以O为圆心的圆与直线
交于A、B两点.若
恰为等边三角形,则劣弧
的长度为( )
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【推荐2】如图,在Rt△ABC中,∠C=90°,以顶点A为圆心,适当长为半径画弧,分别交AC、AB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,作射线AP交边BC于点D,若AC=24,AB=30,且
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【推荐1】如图,在正方形ABCD中,E是AB上一点,BE=2,AE=3,P是AC上一动点,则PB+PE的最小值是( ).
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【推荐2】如图,点
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,
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;②
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;⑤
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【推荐1】下列说法中正确的是( )
A.两个直角三角形一定相似 |
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C.两个等腰直角三角形一定相似 |
D.两个矩形一定相似 |
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名校
【推荐2】如图所示,
是
的直径,D,E是半圆上任意两点,连接
与
相交于点C,要使
与
相似,可以添加一个条件,下列添加的条件中不正确的是( )
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真题
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【推荐1】如图,将
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【推荐2】如图,反比例函数
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在
轴上.若
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