1 . 如图,某广场有一座狮子雕塑,A,B两点分别为雕塑底座的两端,为测得A,B两点间的距离,在地面选择一点O,连接
并延长至点C,使
,连接
并延长至点D,使
,连接
,此时
,测量
的长即为A,B两点间的距离,这里判定
的依据是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b696ee663a89d24dfc6a11666e46ff98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c940869dd66321d1132828a95cb5353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdf8b8bed958cdabdbbe8d7ad6e0715e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdf8b8bed958cdabdbbe8d7ad6e0715e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/31/0952ad76-4dac-4109-932a-f53a71df3b48.png?resizew=159)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 如图,在①
;②
;③
这三个条件中任选一个,补充在下面横线上,并按要求完成问题解答.
问题:若已知
,
,且______;为说明
,列出所有的选择,并写出说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8abfdaab699cfe51bb9678110ad6aee.png)
问题:若已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b54b2d216a66a9cc6bc4348f3cec50c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52273305805769a438772342b53c289e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/2/ebd88299-34bd-4b66-8ae9-b65b6a438495.png?resizew=174)
您最近一年使用:0次
2023-07-25更新
|
119次组卷
|
2卷引用:广东省茂名市直属学校2022-2023学年七年级下学期期末数学试题
3 . 如图,已知等腰
与等腰
的顶角分别是
和
,
,请说明
.下面是解答过程,请在括号内填上相应的依据.
解答过程:因为
与
是等腰三角形,
所以
,
(______)
因为
,
所以
,(______)
所以______,(等量代换)
在
和
中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64abcdbf7688e0888131d6057e77eba.png)
所以
(______).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f2281cb6df0c3c518ce5ed19a02b57e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685516a27697104e83b311d76efa17aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c494fd123ed404f0668c799ffdec9ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2524a121b46f521cb7d86352ce169fef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/14/61e67230-a639-4790-bccb-d7203706f024.png?resizew=144)
解答过程:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f2281cb6df0c3c518ce5ed19a02b57e.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55b6ce55e67f6e95e616eaf1ca3f6f8.png)
因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c494fd123ed404f0668c799ffdec9ba.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea0bf7c48dd099e887ff71651065868.png)
所以______,(等量代换)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64abcdbf7688e0888131d6057e77eba.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2524a121b46f521cb7d86352ce169fef.png)
您最近一年使用:0次
4 . 按要求完成下列各小题.
(1)如图1,直线
是一个轴对称图形的对称轴,在方格纸上,画出这个轴对称图形的另一半;
(2)如图2,已知线段
,
,
.
①用尺规在方框中作
,使
,
,
;(保留作图痕迹,不写作法)
②①中的作图依据是______________________________.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/3/f6d8864f-9be9-4261-83e0-37304cbd3ce5.png?resizew=465)
(1)如图1,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)如图2,已知线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
①用尺规在方框中作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e781a2489271bfd1597cba1bb6f5887.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aada537209e8ab7626e42b17f68907b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbad56fe41599eee0bac6241d3e1db8.png)
②①中的作图依据是______________________________.
您最近一年使用:0次
2023-06-30更新
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38次组卷
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2卷引用:河北省保定市高碑店市第二中学2022-2023学年七年级下学期第二次月考数学试题
5 . “倍长中线法”是解决几何问题的重要方法.所谓倍长中线法,就是将三角形的中线延长一倍,以便构造出全等三角形,具体做法是:如图,
是
的中线,延长
到
,使
,连接
,构造出
和
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ad98ad714864041a632ca949308e417.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07fbad473c16df3ff62c1c6b37de6aa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a4a514e2e338c6fa31c9938624a4a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/440095115d64b74e4b1c30e402c178e1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/2/feeed0a9-9ca2-4ee5-a537-6f179fbaaf80.png?resizew=158)
您最近一年使用:0次
2023-06-01更新
|
842次组卷
|
6卷引用:2023年云南省昆明市官渡区中考二模数学试题
2023年云南省昆明市官渡区中考二模数学试题(已下线)第06讲 SAS,ASA证全等-【暑假自学课】2023年新八年级数学暑假精品课(人教版)(已下线)专题12.21 全等三角形几何模型(倍长中线)(分层练习)-2023-2024学年八年级数学上册基础知识专项突破讲与练(人教版)(已下线)专题12.4 全等三角形的判定(SSS、SAS)(知识梳理与考点分类讲解)-2023-2024学年八年级数学上册基础知识专项突破讲与练(人教版)(已下线)专题1.21 全等三角形几何模型-倍长中线(分层练习)-2023-2024学年八年级数学上册基础知识专项突破讲与练(苏科版)(已下线)专题1.4 探索三角形全等的条件(SSS,SAS)(知识梳理与考点分类讲解)-2023-2024学年八年级数学上册基础知识专项突破讲与练(苏科版)
6 . 如图,在
中,点
,
是对角线
上的两个点,且
,连接
,
.求证:
.
下列说法错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/550b15375a54ce849585b60bc42d2dd1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/23/22bb19c8-c0f7-46fe-882c-0d87e50e57dd.png?resizew=283)
证法1:如图,在![]() ![]() ![]() ![]() ![]() 又 ![]() ![]() ![]() ![]() 即 ![]() ![]() | 证法2:如图,连接![]() ![]() ![]() ![]() ![]() ![]() 在 ![]() ![]() ![]() 又 ![]() ![]() ![]() ![]() ![]() ![]() |
A.证法1中证明三角形全等的直接依据是SAS | B.证法2中用到了平行四边形的对角线互相平分 |
C.证法1和证法2都用到了平行四边形的判定 | D.证法1和证法2都用到了平行四边形的性质 |
您最近一年使用:0次
2023-05-11更新
|
253次组卷
|
3卷引用:2023年河北省衡水市第一教育联盟中考二模数学试题
7 . 如图,把两个扇形
与扇形
的圆心重合叠放在一起,且
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/12/801e6669-87ea-41da-b781-ac53bcc8c8f2.png?resizew=162)
(1)求证:
;
(2)若
,弧
的长为
,弧
的长为
,求阴影部分的面积;
(3)在(2)的条件下求由扇形
围成的圆锥的高.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3201d3796ed9a29338aac25245a7c8e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7330146c006e1c431e63ac0c6161f4f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/12/801e6669-87ea-41da-b781-ac53bcc8c8f2.png?resizew=162)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc71a35bdba1c97053be4212d6444176.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ffb19a4c459090200bddd831219a8d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d324ab8e3a14379a8f16b79c04263fc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d957a68654c4a97d15c0c719982ace4e.png)
(3)在(2)的条件下求由扇形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
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8 . 在
和
中,已知
,
,
,
,
,
,能证明
的判定方式为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecfb02e157819a2bdd0f2790cbc825e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae8221601c7bd5c51fd520615581fa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b81aa981863ca3ae4eaccb212f68fd13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e3fa59bbd016ba85cd38499697434c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67b5ab4a6d15d55bc254cd4c76fffa56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4943cffb2d3e6dd27737bf184fa9ab0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e5eaa68797150b1e70b7457d2b136f0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
9 . 如图1,在正方形
中,
,点
是射线
上一点,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/7/afac1e93-d101-451f-ab2f-fab05b0f6e02.png?resizew=363)
(1)当点
是边
的中点时,求证:
;
(2)如图2,点
分别是
的中点,依次连接
.
请判断四边形
的形状,并说明理由;
若点
是
的中点,连接
,当
的面积为
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1fe462dd495948ac5772e5e640607e4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/7/afac1e93-d101-451f-ab2f-fab05b0f6e02.png?resizew=363)
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b848d81bf2e64bdec5aaed6ce6191d2c.png)
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68f2c6d854d7ca94f77c0c9ba969dd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764151f85f212f598031755d1f640e17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a723e46c62760e7ef784f2dd0a371c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cddf15f3ae42534288a2575cb4d1dc61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4269a5e908aefd0acecef045d0242d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
您最近一年使用:0次
2023-02-27更新
|
93次组卷
|
2卷引用:海南省省直辖县级行政单位乐东黎族自治县2022-2023学年九年级上学期期末数学试题
名校
10 . 如图,
,
,
.有下列结论:
①把
沿直线
翻折180°,可得到
;
②把
沿线段
的垂直平分线翻折180°,可得到
;
③把
沿射线DC方向平移与
相等的长度,可得到
.
其中所有正确结论的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2472d67cff64232cb7d42177a890e15.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/29/b8be8c85-4d46-4c8b-b6c8-a305486a9927.png?resizew=120)
①把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80651f797ab9dccfd7163c605b091ad5.png)
②把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80651f797ab9dccfd7163c605b091ad5.png)
③把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
其中所有正确结论的序号是( )
A.①② | B.①③ | C.②③ | D.①②③ |
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2023-01-30更新
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505次组卷
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3卷引用:北京市西城区2022-2023学年八年级上学期期末数学试卷