【知识探究】探究得到定理:直角三角形斜边上的中线等于斜边的一半.
【定理证明】请你利用矩形的性质,证明该定理.
已知:如图1,在
中,
,
是
的中点;
.
(2)【灵活运用】如图2,四边形ABCD中,
,
,E,F分别是
,
的中点,连接
,
,
,求证:
.
【定理证明】请你利用矩形的性质,证明该定理.
已知:如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fc58dc365e8bb140a95746bbfb5abb6.png)
(2)【灵活运用】如图2,四边形ABCD中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56ee81929c987732fcb379802eeef7a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
23-24九年级上·福建漳州·期中 查看更多[3]
福建省漳州市诏安县初中第一教研片2023-2024学年九年级上学期期中数学试题河南省信阳市平桥区2023-2024学年八年级下学期期中数学试题(已下线)考题猜想3-2平行四边形(常考,构造中位线解题的五种方法)-2023-2024学年八年级数学下学期期末考点大串讲(人教版)
更新时间:2023-12-01 16:43:25
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】已知一次函数
的图象与坐标轴交于A,B两点,AE平分∠BAO,交x轴于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/12/49ddc9fb-538a-4a17-957e-4510b4ddfed9.png?resizew=192)
(1)直接写出点A和点B的坐标;
(2)求点E的坐标;
(3)过点B作BF⊥AE,垂足为F,连接OF,
①判断△OFB的形状并说明理由;
②求△OFB的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2107c297f7a5a8f147c889a92b136a3c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/12/49ddc9fb-538a-4a17-957e-4510b4ddfed9.png?resizew=192)
(1)直接写出点A和点B的坐标;
(2)求点E的坐标;
(3)过点B作BF⊥AE,垂足为F,连接OF,
①判断△OFB的形状并说明理由;
②求△OFB的面积.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图,将矩形
绕点A顺时针方向旋转得到矩形
,使点G落在
边上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/11/7593c1bb-4388-4a95-a020-7037dff22b6d.png?resizew=236)
(1)连接
,求证:
平分
;
(2)连接
交
于点H,求证:H为
中点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/11/7593c1bb-4388-4a95-a020-7037dff22b6d.png?resizew=236)
(1)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce8f887360a533f0a25b0b34fb11f0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfe477161305614f0afa00952e25bedc.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图所示,在
中,点
,
分别为
,
的中点,点
在线段
上,连接
,点
,
分别为
,
的中点.
为平行四边形;
(2)若
求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73caeb0b4a304f204692192a4f24a58b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
您最近一年使用:0次
解答题-应用题
|
适中
(0.65)
【推荐2】如图1,A、B两地被建筑物阻隔,为测量A、B两地的距离,在地面上选一点C,连接
,
分别取
,
的中点D、E.
的长为
,则A、B两地的距离为_______
.
(2)如图2,在四边形
中,
,点E、F分别是
和
的中点,
求
的长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c08094f72d5bd69246c453dd28e33d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e00f40396e914d1d9955bd7785f1f.png)
(2)如图2,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.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/cac464a7d0ffcb6fe30a53ac1e4fd686.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fd6420c2a2fbeb67c691f2a864799a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,在
中,
,
是
的中点,
是
的中点,过点
作
交
的延长线于点
.
(1)求证:
;
(2)求证:四边形
是菱形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880efdb2b4ac4861ad808e0162d082be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/11/ce1f2637-5612-4856-8afc-2b436b304c17.png?resizew=222)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e2e1083b773e16d1e385072652f7319.png)
(2)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a5a2949b3d520ed03d57126c7d4d8d.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在锐角三角形ABC中,AD⊥BC于点D,点E,F,G分别是AC,AB,BC的中点.求证:FG=DE
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/21/b454d3aa-0c6a-4196-bd3d-e01ff45f55ba.png?resizew=161)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在平行四边形ABCD中,∠BAD的平分线交CD于点E,交BC的延长线于点F,连接BE,∠F=45°.求证:四边形ABCD是矩形
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/a9eaa4aa-31cf-4877-b416-b4e9a3400f6a.png?resizew=207)
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▱ABCD中,G是CD的中点,E是边长AD上的动点,EG的延长线与BC的延长线相交于点F,连接CE,DF.
(1)求证:四边形CEDF是平行四边形.
(2)若BC=2AB=8,∠B=60°.填空:
①当AE= 时,四边形CEDF是矩形;
②当AE= 时,四边形CEDF是菱形.
(1)求证:四边形CEDF是平行四边形.
(2)若BC=2AB=8,∠B=60°.填空:
①当AE= 时,四边形CEDF是矩形;
②当AE= 时,四边形CEDF是菱形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/0fd50af8-daee-4522-8ccf-99331217a061.png?resizew=172)
您最近一年使用:0次