如图,三个边长均为2的正方形重叠在一起,O1、O2是其中两个正方形的中心,则阴影部分的面积是( )
![](https://img.xkw.com/dksih/QBM/2015/3/21/1573820060041216/1573820065792000/STEM/0bbcfb5cfade4c6cb41bccb7404e34dc.png)
![](https://img.xkw.com/dksih/QBM/2015/3/21/1573820060041216/1573820065792000/STEM/0bbcfb5cfade4c6cb41bccb7404e34dc.png)
A.1 | B.![]() | C.2 | D.![]() |
更新时间:2016-12-05 23:28:01
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【推荐1】如图,在等边
中,
,点
在
外部,且
,连接
交
于点
,
,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ab6cba582b1d7b6018152fadd54b5da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
A.![]() | B.![]() | C.3 | D.2 |
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【推荐2】如图,
、
为⊙O的切线,切点分别为A、B,
交
于点C,
的延长线交⊙O于点D.下列结论不一定成立的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
A.![]() | B.![]() ![]() |
C.点A、B都在以![]() | D.![]() ![]() ![]() |
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【推荐1】如图,小宋作出了边长为2的第一个正方形A1B1C1D1,算出了它的面积.然后分别取正方形A1B1C1D1四边的中点A2、B2、C2、D2作出了第二个正方形A2B2C2D2,算出了它的面积.用同样的方法,作出了第三个正方形A3B3C3D3,算出了它的面积…,由此可得,第六个正方形A6B6C6D6的面积是( )
![](https://img.xkw.com/dksih/QBM/2016/3/17/1574184055799808/1574184062083072/STEM/53d9ea8210fa4010a10c602aed277229.png)
![](https://img.xkw.com/dksih/QBM/2016/3/17/1574184055799808/1574184062083072/STEM/53d9ea8210fa4010a10c602aed277229.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,在正方形
中,
是
的中点,点
在
上,且
.则
的面积是( )
![](https://img.xkw.com/dksih/QBM/2020/4/26/2449976268161024/2450689730658304/STEM/946ba8daa893473ba2115db87132b6da.png?resizew=88)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/328e60413160534f96680f11f53002cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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![](https://img.xkw.com/dksih/QBM/2020/4/26/2449976268161024/2450689730658304/STEM/946ba8daa893473ba2115db87132b6da.png?resizew=88)
A.5 | B.6 | C.7 | D.8 |
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