如图,矩形
的两条对角线相交于点O.图中有多少对全等三角形?把它们写出来.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/82d84783-9420-4b6e-84b0-6ba5621eef1e.png?resizew=160)
21-22八年级下·全国·课后作业 查看更多[1]
(已下线)【浙教版课时练习】八年级下册5.1 矩形
更新时间:2022-11-28 20:59:39
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相似题推荐
解答题-问答题
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【推荐1】用给出的图形(如图所示)编写两个三角形全等的题目.
![](https://img.xkw.com/dksih/QBM/2018/2/28/1891972586913792/1897262852866048/STEM/e011d0cb-884d-4bc3-b344-0bbf1a70c96d.png?resizew=157)
(1)需要用“SSS”来说明;
(2)需要用“ASA”来说明.
要求:在已知条件中不能给出AF=CE,也不能给出两个角相等的关系式.
![](https://img.xkw.com/dksih/QBM/2018/2/28/1891972586913792/1897262852866048/STEM/e011d0cb-884d-4bc3-b344-0bbf1a70c96d.png?resizew=157)
(1)需要用“SSS”来说明;
(2)需要用“ASA”来说明.
要求:在已知条件中不能给出AF=CE,也不能给出两个角相等的关系式.
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【推荐2】如图,在
中,
,点
是
的中点,点
在
上.
(1)
与
全等吗?说明你的理由;
(2)请说明
的理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.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://img.xkw.com/dksih/QBM/editorImg/2023/6/10/3353038b-3366-4dbf-9fe1-f139db87199c.png?resizew=133)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
(2)请说明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a702c324e0c76150540c3d32df802077.png)
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【推荐1】综合与实践
问题情境:数学活动课上,张老师要求学生对矩形内两条互相垂直的线段与矩形两邻边的数量关系进行探究,下面是他们的探究过程.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/3/a08cb054-bed7-4fd4-a100-74b7f66c74a5.png?resizew=458)
数学思考:(1)如图1.在矩形
中,
,
,
、
分别是
、
上的两点,连接
、
,
于点
,则
________.
深入探究:(2)如图2,在矩形
中,
,
分别交
、
于点
、
,
分别交
、
于点
、
.求证:
.
拓展延伸:(3)如图3,在
中,
,点
在边
上,连接
,过点
作
于点
,且
的延长线交
边于点
.若
,
,
,请直接写出
的长.
问题情境:数学活动课上,张老师要求学生对矩形内两条互相垂直的线段与矩形两邻边的数量关系进行探究,下面是他们的探究过程.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/3/a08cb054-bed7-4fd4-a100-74b7f66c74a5.png?resizew=458)
数学思考:(1)如图1.在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f87b02b744534ae1ed700d21fcceb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fb8b625bbd261f00bb007516796c2bd.png)
深入探究:(2)如图2,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de64cbea23ec8a57a4705d9f16297d80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.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/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ace4bbfac49cd8ebd405f385d5813e2.png)
拓展延伸:(3)如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eddf629bfb2d7b9daea6f2c1553360af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497846628a41a9bc750a645e045afb47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5697930f9fde7109b23307db66c9c7d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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解答题-证明题
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【推荐2】已知:如图,在矩形ABCD中,AC的垂直平分线EF分别交AD、BC于点E、F,垂足为O,连结AF、CE.
![](https://img.xkw.com/dksih/QBM/2020/7/25/2513757027352576/2514390547972096/STEM/fd579d1d-7e21-4df6-97e2-6d18dc48bab0.png?resizew=155)
求证:四边形AFCE是菱形.
![](https://img.xkw.com/dksih/QBM/2020/7/25/2513757027352576/2514390547972096/STEM/fd579d1d-7e21-4df6-97e2-6d18dc48bab0.png?resizew=155)
求证:四边形AFCE是菱形.
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