1 . 如图,在
中,
,分别以点A和点C为圆心,大于
的长为半径画弧,两弧相交
的两侧于点M,N,作直线
,交
于点D,连接
,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/2024/1/17/3412936816074752/3445491477864448/STEM/9922485568924c709a9f5851e5921d4a.png?resizew=167)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a6c43da105505c8528f6f1a84e8a52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c93148adbc6e856da9a9d263f485d003.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.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/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://img.xkw.com/dksih/QBM/2024/1/17/3412936816074752/3445491477864448/STEM/9922485568924c709a9f5851e5921d4a.png?resizew=167)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2 . 如图,
是
的中垂线,连接
.则在图中能用字母表示全等三角形一共有_______ 对.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fb7c9b5376c6d491e743b710bc25701.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/6f5704f1-991a-462c-8910-cf1c15395bcd.png?resizew=196)
您最近一年使用:0次
3 . 如图,等腰三角形
中,底边
的长为
,面积是
,腰
的垂直平分线
分别交
,
于点E,F,若点D为边
的中点,点M为线段
上一动点,则
的最小值为________
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9938aea41f03701b233dee15809f2126.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69e11c75a166f2b75feac40dc69a2cb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c8c210650b91825d919c5cc1cf0ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/405554b6a34430029b4bab739d69bca3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/57e666cc-14b5-4870-b103-063d31205914.png?resizew=122)
您最近一年使用:0次
名校
4 . 同学们在做题时,经常用到“在直角三角形中,
角所对的直角边等于斜边的一半”这个定理,下面是两种添加辅助线的证明方法,请你选择一种进行证明.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/38c16957-bc4d-4abd-a4ce-0bddbd3d3765.png?resizew=102)
已知在
中,
,求证:
.
法一:如图1,在
上取一点
,使得
,接
.
法二:如图2,延长
到
,使得
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/5648c980-e8b3-4480-8063-a9f692c24315.png?resizew=310)
图1 图2
你选择方法_______
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/38c16957-bc4d-4abd-a4ce-0bddbd3d3765.png?resizew=102)
已知在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655b4e453406dad357caf3faea5cbae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe44ff9f829f6c034682572ad00e366.png)
法一:如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feb67f27bcda7681b19239a199b4c4d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
法二:如图2,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/5648c980-e8b3-4480-8063-a9f692c24315.png?resizew=310)
图1 图2
你选择方法_______
证明:
您最近一年使用:0次
2024-03-03更新
|
74次组卷
|
8卷引用:第11讲 等边三角形的性质与判定定理-【暑假自学课】2023年新八年级数学暑假精品课(浙教版)
(已下线)第11讲 等边三角形的性质与判定定理-【暑假自学课】2023年新八年级数学暑假精品课(浙教版)(已下线)浙江省金华市婺城区2023-2024学年九年级上学期期末数学试题2023年北京二中教育集团中考一模数学试卷(已下线)专题13 三角形及全等三角形(共35题)-学易金卷:5年(2019-2023)中考1年模拟数学真题分项汇编(北京专用)河南省许昌市禹州市2023-2024学年八年级上学期期中数学试题(已下线)专题06+全等三角形和特殊三角形(4大易错点分析)2-备战2024年中考数学考试易错题(浙江专用)北京景山学校2023-2024学年九年级下学期开学考试数学试题北京市回民学校2023-2024学年九年级下学期月考数学试题
5 . 如图,
中,
是
的垂直平分线,
,
,则
的周长是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae8221601c7bd5c51fd520615581fa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/ed734150-bfc9-4d47-b5cb-09f35b4e011d.png?resizew=149)
您最近一年使用:0次
6 . 已知,如图,在
中,
是
边上的中线,
于点G,
.
![](https://img.xkw.com/dksih/QBM/2024/2/28/3443056873275392/3444241640292352/STEM/088112ef32564a65a4b3d170eb58239b.png?resizew=310)
(1)求证:
.
(2)若
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/085cbdd37657b21dd1b686fc02d4f223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/401413ceec00db49eca223a72cd97a52.png)
![](https://img.xkw.com/dksih/QBM/2024/2/28/3443056873275392/3444241640292352/STEM/088112ef32564a65a4b3d170eb58239b.png?resizew=310)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d831c9ba6d18774540e2aaa29132fec9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd5d969f798b373a03b28f5c9094bd62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
您最近一年使用:0次
7 . 如图,在
中,
是钝角.(保留作图痕迹)
(1)用无刻度的直尺和圆规作
的垂直平分线,分别交
于点
.
(2)连结
,若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/f7e71571-e48d-47a6-8a26-8bf732382420.png?resizew=153)
(1)用无刻度的直尺和圆规作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a51949f48ee8cf746851ba779b078e.png)
(2)连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54eb01dd383cde273a69b863f96528e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15f9b8f9f159077d59974c8a70c28563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
您最近一年使用:0次
2024-03-02更新
|
41次组卷
|
2卷引用:浙江省宁波市南三县2023-2024学年八年级上学期期末考试数学试题
8 . 在平面直角坐标系中,
为原点,点
,
,
.若将点
向右平移10个单位长度,再向上平移4个单位长度,得到对应点
.
(1)点D的坐标为______;
(2)若点
是
轴上一动点,若
的面积等于
的面积,请求出点
的坐标;
(3)若点
为
轴上一动点,若
为等腰三角形,请直接写出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc878a5fd7b508cf817cbb65d3940547.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/428426e7f2ee0502b555a87a5cef6cb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d03310fa9440053c57d878acc06d02d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/c2020351-2fe7-4a94-9fac-46e0c6c2de11.png?resizew=141)
(1)点D的坐标为______;
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a4a514e2e338c6fa31c9938624a4a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a313fa9db2c50907e7341b07cdde8021.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
您最近一年使用:0次
2024-03-01更新
|
56次组卷
|
2卷引用:浙江省宁波市鄞州区2023-2024学年八年级上学期期末考试数学试题
9 . 如图,在
中,
,点D在边
上(不与点B,C重合),且
,过点D作
,分别交
的延长线和
于点P和点Q.
.
(2)若点Q是线段
的中点,探索
与
的数量关系.
(3)若
的形状和大小都确定,说说
的值是否为定值,如果是定值,直接写出这个定值的几何意义;如果不是定值,说明理由.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3d44c6222502af3ccc9cbc4ce7051e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f94900d0fc083f27067134945791d64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b38bbd93669765af69d7bb0049e2819b.png)
(2)若点Q是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350e954f629c1901a5cec03558319e46.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/668fb30439262e754d6d915240f558b6.png)
您最近一年使用:0次
10 . 如图,在
中,
,
是
边上的高.
是
的中点,求证:
;
(2)若
,
,求
的长.
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50196d293a863fe2f9e46199052ab8c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
您最近一年使用:0次