如图,
是长方形
内一点,过点
分别作
,
,(
,
,
,
在长方形的各边上),这样,
,
就把长方形
分割成四个小长方形,若其中长方形
的面积是其周长的1.5倍,长方形
和长方形
的面积均为4,则长方形
的周长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/058f36d315245b63a811d5c6f348c17b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4476e03c84c623f04df5dbac712e40a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6676a2b1309813cf400a0334fff0ecef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b322791641a4d39636ebf62c13acdc00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a4c7586c9811d9aa0d7adf8f4b2fa65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39308914fee6e0195ced50efa7948f9a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/b0f154c5-a57d-41dd-bf4e-0ee8b0320e63.png?resizew=180)
19-20七年级下·浙江杭州·期末 查看更多[1]
(已下线)【新东方】初中数学1110【2020年】【初一下】
更新时间:2021-03-06 09:41:19
|
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【推荐1】如图,△ABC中,AB=BD,点D,E分别是AC,BD上的点,且∠ABD=∠DCE,若∠BEC=105°,则∠A的度数是_____ .
![](https://img.xkw.com/dksih/QBM/2019/9/25/2298332291948544/2302737985462272/STEM/9cb515bc36bb4972bc16457625b4825c.png?resizew=163)
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【推荐2】如图,在长方形
中,放入6个形状、大小都相同的长方形,所标尺寸如图所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/32a7cb8d-c998-4928-a1a2-b5dc1c0b7a08.png?resizew=200)
(Ⅰ)若平移这六个长方形,则图中剩余的阴影部分面积是否改变?______ (填“变”或“不变”).
(Ⅱ)若不变,请写出图中阴影部分面积;若变,请说明理由.
______________________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/32a7cb8d-c998-4928-a1a2-b5dc1c0b7a08.png?resizew=200)
(Ⅰ)若平移这六个长方形,则图中剩余的阴影部分面积是否改变?
(Ⅱ)若不变,请写出图中阴影部分面积;若变,请说明理由.
您最近一年使用:0次