如图,在
中,
的垂直平分线
交
于D,交
于M,E为
的中点,
,
.猜想线段
与线段
之间的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e81c8bbdaff4a4d69fad8d7c1f7fa97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14814fdc3ca8034bbd97cb76bed9c9d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/e6193cc4-43c3-4028-bdf0-bd44ace38d71.png?resizew=224)
20-21八年级上·山东聊城·期中 查看更多[2]
更新时间:2020-12-02 06:24:19
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图①,四边形
是边长为2的正方形,
,四边形
是边长为
的正方形,点
分别在边
上,此时
,
成立.
(1)当正方形
绕点
逆时针旋转
,如图②,
成立吗?若成立,请证明;若不成立,请说明理由;
(2)当正方形
绕点
逆时针旋转
(任意角)时,
仍成立吗?直接回答;
(3)连接
,当正方形
绕点
逆时针旋转
时,是否存在
∥
,若存在,请求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72794bd3cbe1a898e2254c3dd98a437e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed61f19cf6d0ad1d2beb75127dccc390.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8f90eb172dbd2ff7ae6f705801c0737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de9f075d2558b7dce0eb91148de84fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92034dd2bb9480b18709d01153467f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c252a0fe067d434a2b5aeac011b9914.png)
(1)当正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfced7562716162cec99546302fa281a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6f16a8251c51bfde1cea2527153b045.png)
(2)当正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6f16a8251c51bfde1cea2527153b045.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23b47f459bf46292108d7b5d257d6596.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/2020/3/15/2419923996532736/2420762117586944/STEM/9a43ebcc54fa4c59bbc72e6b496f25be.png?resizew=402)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在
中,
,
,
是
边上的中线,过点
作
,垂足为
,过点
作
,交
的延长线于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/28/ff07f33b-d24c-4476-922a-242b1bdf2ab3.png?resizew=168)
(1)求证:
;
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34c23e376ab222814e0029d2adb5a957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d5ff57f147aa0628fdd47899b5a132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/28/ff07f33b-d24c-4476-922a-242b1bdf2ab3.png?resizew=168)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/409457b2c4257bc6c9e47969352a9f58.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75ec1c73794dca0a18c1ec510398ccff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐1】如图,小河边有两个村庄A、B.要在河边建一自来水厂向A村与B村供水.
(1)若要使水厂到A、B村的距离相等,则应选择在哪建厂?
(2)若要使水厂到A、B村的水管最省料,应建在什么地方?(保留作图痕迹,不写作法)
(1)若要使水厂到A、B村的距离相等,则应选择在哪建厂?
(2)若要使水厂到A、B村的水管最省料,应建在什么地方?(保留作图痕迹,不写作法)
![](https://img.xkw.com/dksih/QBM/2020/11/11/2590811199340544/2603571882754048/STEM/d0196a4725654707b3fbae4f230314f2.png?resizew=182)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】作图题,在下面图中找出点A,使它到M,N两点的距离相等,并且到OH,OF的距离相等.(不写作法,要求保留作图痕迹)
![](https://img.xkw.com/dksih/QBM/2018/12/5/2090138862682112/2092268972376064/STEM/5340df9e4ecb4ad6843dc03442a4460d.png?resizew=163)
您最近一年使用:0次