如图,边长为3的正方形
绕点C按顺时针方向旋转
后,得到正方形
,
交
于H,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d819c261ee68e705e0d71815a050b7aa.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/c7e4fa04825ac7d071968056322d88be.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/16/5878c53b-a0c3-46c8-a99c-46e6d6f3a55b.jpg?resizew=123)
2022九年级上·全国·专题练习 查看更多[1]
(已下线)1.3 正方形的性质与判定(习题)-2022-2023学年九年级数学上册同步精讲精练(北师大版)
更新时间:2023-09-08 21:06:38
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相似题推荐
解答题-问答题
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【推荐1】如图,
,
为
的直径,
为
上一点,过点
的切线与
的延长线交于点
,
,点
是
的中点,弦
,
相交于点
.
的度数;
(2)若
,求
直径的长.
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a747b385911ad6c6147a7cd4c20a4c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd6ffb78dad3375efa3b08ab518553d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb0b2fb47382e76af829559a75b48fca.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1496042c1d721cffd25053e997a9a97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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解答题-证明题
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【推荐2】如图,在等腰
中,
,
平分
,过点
作
交
的延长线于
,连接
,过点
作
交
的延长线于
.
的形状,并说明理由;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec9e2a600d4675d510c58b984027e33d.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14c89f9fb5d1a84be8aee78dca23090d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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解答题-问答题
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【推荐1】如图,已知一次函数的图象经过A(0,-3)、B(4,0)两点.
(1)求这个一次函数的解析式;
(2)若过O作OM⊥AB于M,求OM的长.
(1)求这个一次函数的解析式;
(2)若过O作OM⊥AB于M,求OM的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/14/2ef2a41b-7184-45dd-9b16-da8f6c9da225.png?resizew=236)
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【推荐2】如图,AB是⊙O的直径,AD⊥AB于A,点E为⊙O上一点,AD=DE,连接DE并延长,交AB延长线于C.
![](https://img.xkw.com/dksih/QBM/2022/4/3/2950470825795584/2952364902391808/STEM/bd47019a-85d3-4909-ac5e-39c6e7fc0353.png?resizew=180)
(1)求证:CD与⊙O相切;
(2)若AC=6,∠C=30°,求线段EC的长.
![](https://img.xkw.com/dksih/QBM/2022/4/3/2950470825795584/2952364902391808/STEM/bd47019a-85d3-4909-ac5e-39c6e7fc0353.png?resizew=180)
(1)求证:CD与⊙O相切;
(2)若AC=6,∠C=30°,求线段EC的长.
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【推荐1】已知:P是正方形ABCD对角线BD上一点,PE⊥DC,PF⊥BC,E、F分别为垂足.
求证:AP=EF.
求证:AP=EF.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/82396e6e-31d4-4155-be43-6fba279d7c3a.png?resizew=132)
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【推荐2】【初步思考】
(1)如图1.在四边形
中,
,E,F分别是边
,
上的点,且
.求证:
.
小阳发现此题是证明线段的和(差)问题,根据证明此类题型的常见方法,于是就有了如下的思考过程:请你在下面的框图中填空 帮他补全证明思路.
【问题解决】
(2)如图2,在四边形
中,
,E、F分别是边BC,CD上的点,且
,(1)中的结论是否仍然成立?请说明理由.
【拓展延伸】
(3)如图3,四边形
是边长为7的正方形,
,求
的周长.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/29/0063992d-bb01-49fb-bd2a-c446f18ad67c.png?resizew=538)
(1)如图1.在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3090f4c81b170ab122be456a6a806d68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f585c8a84491d24cdbf724660d7b521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e370923be3d4b7034a5992065b5f7d7.png)
小阳发现此题是证明线段的和(差)问题,根据证明此类题型的常见方法,于是就有了如下的思考过程:请你在下面的框图中
第一步:延长![]() ![]() ![]() ![]() ![]() ![]() 第二步: ![]() ![]() ![]() 第三步:易证 ![]() ![]() ![]() ![]() ![]() |
(2)如图2,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2418565055ccb4b8a21db17d006ae37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f585c8a84491d24cdbf724660d7b521.png)
【拓展延伸】
(3)如图3,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83910639ac9ea98d4980fd0820178d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
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解答题-作图题
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【推荐1】如图,在等边△ABC中,将线段AC绕点A顺时针旋转α(0°<α<60°),得到线段AD,连接CD,作∠BAD的平分线AE,交BC于E.
![](https://img.xkw.com/dksih/QBM/2022/5/9/2975841816510464/2977079168786432/STEM/5d14bfbc9da84269aa2b2ce8f1501150.png?resizew=187)
(1)①根据题意,补全图形;
②请用等式写出∠BAD与∠BCD的数量关系,并证明.
(2)分别延长CD和AE交于点F,用等式表示线段AF,CF,DF的数量关系,并证明.
![](https://img.xkw.com/dksih/QBM/2022/5/9/2975841816510464/2977079168786432/STEM/5d14bfbc9da84269aa2b2ce8f1501150.png?resizew=187)
(1)①根据题意,补全图形;
②请用等式写出∠BAD与∠BCD的数量关系,并证明.
(2)分别延长CD和AE交于点F,用等式表示线段AF,CF,DF的数量关系,并证明.
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【推荐2】如图,在正方形ABCD中,射线AE与边CD交于点E,将射线AE绕点A顺时针旋转,与CB的延长线交于点F,
,连接FE.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/a5a3f924-7f81-49e9-8b60-29267134a4bb.png?resizew=148)
(1)求证:
;
(2)若
,
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03687d97d61b4a7cecbb73f2a6604212.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/a5a3f924-7f81-49e9-8b60-29267134a4bb.png?resizew=148)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac3d3b55561ec5d4acc242ecd1c7f41.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cf14bc3bfe884ddfff067ba7f410b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
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