1 . 填空:把下面的推理过程补充完整,并在括号内注明理由.
已知:如图,
,
,
,试说明
.
解:∵
(已知)
∴
( )
在
与
中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a510a3eb906b3ef0760b0d1723d11ae.png)
∴
( ).
∴
( ).
已知:如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba46f9fceccff74b15e6dad269412cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f3e6746389305367e7b524ea7aa6e45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a510a3eb906b3ef0760b0d1723d11ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43c10ef52c84726a0a1e9a11c660f921.png)
解:∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba46f9fceccff74b15e6dad269412cd.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4db07c6ce6c8b0e96a3470c6a3491334.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a510a3eb906b3ef0760b0d1723d11ae.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ca10806fc8c3c3efd6859f526b76900.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43c10ef52c84726a0a1e9a11c660f921.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/6/191d2876-688d-4698-8cf9-23973d8062b9.png?resizew=140)
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名校
2 . 已知:如图,
,
,
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5adaae99b4ac308549134169e69247a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c244edbf77fbb8e9c017515e370c5c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c503e29373e8d87134bdb46bd3912910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe465ffd37135143da507d5797ed819.png)
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2023-12-31更新
|
338次组卷
|
3卷引用:吉林省长春市绿园区2023-2024学年八年级上学期期末考试数学试题
3 . 如图,已知
,
,那么判定
的依据是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/f58f0f60-b89c-4b43-8b92-11cf6874db2f.png?resizew=149)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d2530e7023b2345c651e8f53629ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5d5f49c0d6162ea6264c23fdff924cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/f58f0f60-b89c-4b43-8b92-11cf6874db2f.png?resizew=149)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 滑翔是一项极限运动,有一款滑翔翼的平面图如图所示,小夏买来通过测量得到一组数据:
,
.你能帮助小夏找到一组全等的三角形并证明它吗?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4db17c7685e2e752de6c9b06325d097c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e68df8dee69cd2dee6e59441396120a3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/ecf966e7-e413-43e7-95c0-fb1c725f8cfa.png?resizew=351)
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5 . 全等三角形是几何证明很重要的数学工具,如图所示的两个三角形中,
,
,再添加一个条件____________ 就可以判定
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/958b45552f9fa1a60016483bd8246be9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da8fe8f5f8a3f17561d70652ad1172a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efd123a1f52dd7db2016ef8702af9c8e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/0c37721d-58a0-412d-8349-6b61108ac9ee.png?resizew=196)
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6 . 下面不是全等三角形判定的基本事实的是( )
A.![]() | B.![]() | C.![]() | D.![]() |
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7 . 如图,
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e5f6cb95e67eb160e4a8627a81c6e7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b83407b7a590f1529162e79b8073a62.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/a64e038f-a98c-4029-87d5-4b90da0bf8c1.png?resizew=130)
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8 . 如图,点
,
,
,
在一条直线上,
,
,只需添加一个条件______ ,即可证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/958b45552f9fa1a60016483bd8246be9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac61f3477e623aa4f924a82bd7a06ce4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/17/9aebb8e6-c6b3-4b24-b621-8ec9530b9795.png?resizew=230)
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9 . 如图,把一长一短两根细木棍的一端用绳子绑在一起,使长木棍的另一端与射线
的端点B重合,固定住长木棍,把短木棍摆动,端点落在射线
上的C、D两点位置时,形成的
和
中有
,
,
,则
与
________ (填“全等”或“不全等”).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7189182cc23d759be2764d141952737b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcc52a06d806fde891e09a0a389fcd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f6c20b084a9b0fdad656f838cf9cfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33cbad6599796efc1c177ae9349feda9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02f21f554b941f18170298daaba06e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7189182cc23d759be2764d141952737b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b16a00ffc890ef8cfc038e5039983773.png)
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10 . 如图,
相交于点
,且
,
,则
,理由是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/ca53e89a-41ed-46ad-a2a7-b66a8153a410.png?resizew=201)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d93949d8a15aca4e79cedb978590571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/798d64de38e9d572ff83d68368ad0d9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea76d20f1b5236411cda78c91e55ec5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a19c5d03c413746b2ce45730e2f7344.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/ca53e89a-41ed-46ad-a2a7-b66a8153a410.png?resizew=201)
A.![]() | B.![]() | C.![]() | D.![]() |
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