如图,点C为线段
的中点,在
上取点D,分别以
,
,
,
为边向上作正方形
,
,
,
,当
时,若A,K,J共线,则图中阴影部分的面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/8cd26b1d-0d5d-4e6c-98c9-7196c95e0314.png?resizew=196)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666e9462f20d4004c666654842817476.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a5e84201a818dd3aa43fb80cae26d3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76424801a6b34620c0d71cf016bc6ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfc50ecfa45216f8d098662452cf8d08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/8cd26b1d-0d5d-4e6c-98c9-7196c95e0314.png?resizew=196)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-01-07 19:56:40
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【推荐1】如图,在平行四边形
中,如果点M为
的中点,若已知
,那么
等于( )
![](https://img.xkw.com/dksih/QBM/2024/4/7/3470636124749824/3471373443039232/STEM/5ac16299edcb40e090a0fabe855517c4.png?resizew=158)
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A.6 | B.9 | C.12 | D.3 |
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【推荐2】如图,线段AB=16cm,在AB上取一点C,M是AB的中点,N是AC中点,若MN=3cm,则线段AC的长是( )
![](https://img.xkw.com/dksih/QBM/2022/2/25/2924046836350976/2926854231023616/STEM/535eb641d18f4045b85ac6ab0ba25305.png?resizew=276)
![](https://img.xkw.com/dksih/QBM/2022/2/25/2924046836350976/2926854231023616/STEM/535eb641d18f4045b85ac6ab0ba25305.png?resizew=276)
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【推荐1】如图,在正方形
中,点A的坐标是
,则B点的坐标是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/23/4c39a7e2-2a51-4b35-8b2f-e18140c34454.png?resizew=160)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,正方形ABCD的面积为3,点E在边CD上, 且CE = 1,∠ABE的平分线交AD于点F,点M,N分别是BE,BF的中点,则MN的长为( )
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
【推荐1】如图,在正方形
中,
分别为
的中点,连接
交于点
,将
沿
对折,得到
,延长
交
延长于点
若
则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d70de1ffdd9aa376b09bbcfa12644a1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c3a4638e2eb4e684b73416fb6a0f344.png)
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A.1 | B.2 | C.3 | D.![]() |
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【推荐2】已知D、E、F分别为等腰△ABC边BC、CA、AB上的点,如果
,
,
∠FDE=∠B,那么AF的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/31/d950a62a-2337-453b-bcaf-436d61f6b00f.png?resizew=173)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833d0834e28b50b52a1d82ec3bf9d376.png)
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