更新时间:2023-10-09 22:23:08
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相似题推荐
解答题-计算题
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适中
(0.65)
名校
【推荐2】(1)计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b75a6851be917b4ed8fe26206dc8b2b.png)
(2)先化简再求值:
,其中
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b75a6851be917b4ed8fe26206dc8b2b.png)
(2)先化简再求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62efa403b27b9a5007c218dc19ceea83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f498b6874410fb46e9807e04371e6e5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f06408895febc126c2ae409e807349c.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图1,把两个大小不同的等腰直角三角形
,
如图所示摆放,使得点D、A、B在同一直线上,连结
,
.
;
(2)如图2,将
绕着点A顺时针旋转某个角度后,使得点B、C、E在同一直线上,
与
交于点O.
①求证:
;
②求证:
;
③连结
,如图3,若
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab083b4fd82749bcf218be6131baac63.png)
(2)如图2,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab083b4fd82749bcf218be6131baac63.png)
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b59bfa454f1729db06a42362086230f.png)
③连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5336ad76763e018ceaec8015b2ca27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
您最近一年使用:0次