小丽同学想用一块面积为
,长与宽之比为3:2的长方形纸片,沿着边的方向剪出一块面积为
正方形纸片,试判断小丽同学能否剪出符合要求的纸片?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6d4f8f75e4294f6754529136ca2eedd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75529358d8479534bb097a53862cb682.png)
22-23七年级下·福建福州·期中 查看更多[2]
更新时间:2023-04-24 14:55:19
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解答题-问答题
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适中
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名校
【推荐1】如图,四边形
中,
,点E在
上,连接
交
于点K,
于点F,
交
于点U,G为
的中点,连接
,且
.
;
(2)如图2,当
时,求
的度数;
(3)如图3,在(2)的条件下,连接
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3798a74058ec4bc40b6d9b5d268c359b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1a1fd2fc33e89f357cef772ff6cd0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7aae5475a4dcdb93e6e1703395b26a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e90e426a8dfe6101e412bceca8047e68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727ad3e630a224303d6d3b8ad5c114ba.png)
(3)如图3,在(2)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d8d012fae1e0ad41d283ce648f05007.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11861ebd4deb316bc4f61ada34774a53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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解答题-计算题
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【推荐2】为了丰富学生的课余生活,霖霖同学计划在活动室举行才艺展示活动,由于场地等条件的限制,霖霖同学准备在边长为
的正方形规定区域铺设一块面积是
且长与宽之比为
的长方形地毯,请通过计算比较地毯的长与正方形规定区域的边长之间的大小关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa95be1c601e402b5ffddddeb1af87d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0251657ad0e61a6b9c83b2232330d54c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b1dcdac71e394e495d069f64e1f1ce9.png)
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解答题-计算题
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适中
(0.65)
【推荐1】定义:将分母中的根号化去的过程叫分母有理化,如:将
分母有理化.
解:原式=
+√3,运用以上方法解决问题:
(1)将
分母有理化;
(2)比较大小:(在横线上填写“>” “<”或者”=”)
;
(n≥2,且n为整数);
(3)化简:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522a5aae1ce54b61442e0dd1d0818bb6.png)
解:原式=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf26cb1715faef4289c3b7ccc0de3269.png)
(1)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca50bd5439ff683646e0f14252e5ebb0.png)
(2)比较大小:(在横线上填写“>” “<”或者”=”)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e9e44dd2b08104350503a0084e3a1e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50c15d0889c1fe02e043bf75ae1325da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/084a3c76bbfc6dd5ce14286b017e0b29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2688a2a1cc8be31bda80953f12e18c4b.png)
(3)化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a04af0d4b70100579c52489cde99d6c.png)
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【推荐2】先化简,再求值:
,其中
且为整数,请选择一个合适的x值代入求值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1f95858ce9f77e17dbe52609fadb491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377981b585ec45bd48c94a91f306afe3.png)
您最近一年使用:0次