如图,矩形ABCD的周长为20cm,两条对角线相交于O点,过点O作AC的垂线EF,分别交AD、BC于E、F点,连结CE,则△CDE的周长为 cm.
![](https://img.xkw.com/dksih/QBM/2013/1/7/1573582577270784/1573582638481408/STEM/46471103-60e3-44c6-bf71-e396e1716a47.png?resizew=148)
12-13九年级上·江苏扬州·期中 查看更多[3]
更新时间:2020-09-24 22:22:21
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【推荐1】在
中,
,
垂直平分
交
延长线与点F,已知
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f79997547fb75e88ad1e2c66989a4a0.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】在
中,
,
,
.若点
在
内部(含边界)且满足
,则所有点
组成的区域的面积为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
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【推荐1】如图,矩形ABCD中,AB=6,BC=10,点P在边BC上运动,过点P作PQ⊥AP,交边CD于点Q,则CQ的最大值为___ .
![](https://img.xkw.com/dksih/QBM/2020/4/5/2435070166794240/2435642042974208/STEM/6050237012ce4089b927005318d54590.png?resizew=155)
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【推荐2】已知矩形
,延长
至
,连接
交
于
,
为
的中点,连接
、
.若
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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