1 . 在
中,
,
,
的对边分别为a,b,c,有以下5个条件:
①
; ②
;
③
; ④
;
⑤
.
其中能判断
是直角三角形的是__________ (填序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e597138bc1ed3f80e3d4c5cc736584b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcf6cb47d2204c18cdff0c08a3ee7ad.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a5c14483e7055b9277884ec0ee42f73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51f9bbcdc3da7c621dce00d04d0c521e.png)
⑤
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede13b42d56deff8a8fb57249092ad94.png)
其中能判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
您最近一年使用:0次
2024-02-05更新
|
113次组卷
|
4卷引用:山东省济宁市泗水县洙泗初级中学2023-2024学年八年级下学期3月月考数学试题
2 . 已知
中,
、
、
分别为
、
、
的对边,则下列条件中:①
,
,
,②
:
:
:
:
,③
:
:
:
:
,④
,其中能判断
是直角三角形的有______ (请填序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03026413d48fa0410f73fcc0e24463b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bf9254af4fdc1229275f510405698a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8cc0b4997cae4d8aec791a1d3923314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a881309775c3b6a9f4ed408838666342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ee992ac95cedfbf12db26ab25243e00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/510516d9d2511ded487b4ea6504db103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67ea62ab24b23ee90876ced967f064.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
名校
3 . 下列对
的判断,错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f480c60b88b546cb15d3b5622e212.png)
A.若![]() ![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() ![]() |
您最近一年使用:0次
2023-01-26更新
|
108次组卷
|
4卷引用:江西省上饶市鄱阳县2022-2023学年八年级上学期12月月考数学试题
江西省上饶市鄱阳县2022-2023学年八年级上学期12月月考数学试题(已下线)江西省上饶市鄱阳县乐丰中学2022-2023学年八年级上学期数学第三次月考测试题 海南省海口市第一中学2023-2024学年八年级下学期四月月考数学试题A卷甘肃省白银市2022-2023学年八年级下学期期中数学试题
名校
4 . 下列对△ABC的判断,错误的是( )
A.若![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() |
您最近一年使用:0次
2022-08-06更新
|
814次组卷
|
16卷引用:山东省泰安市宁阳县第十一中学2022-2023学年七年级上学期9月月考数学试题
山东省泰安市宁阳县第十一中学2022-2023学年七年级上学期9月月考数学试题山东省泰安市宁阳县第十一中学2022-2023学年七年级上学期9月月考数学试题山西省朔州市多校联考2023-2024学年八年级上学期第一次月考数学试题重庆市沙坪坝区南开中学校2021-2022学年七年级下学期期末数学试题(已下线)第01讲 与三角形有关的线段(8大考点13种解题方法)-2022-2023学年八年级数学考试满分全攻略(人教版)浙江省宁波市余姚市子陵中学教育集团2022-2023学年八年级上学期期中数学试题(已下线)内蒙古自治区乌兰察布市凉城县宏远中学2022-2023学年八年级上学期期末数学试题浙江省宁波市兰江中学2022-2023学年八年级上学期期中数学试题(已下线)专题01 与三角形有关的边(八大类型)(题型专练)-2023-2024学年八年级数学上册《知识解读·题型专练》(人教版)(已下线)专题01 认识三角形(十一大类型)(题型专练)-2023-2024学年八年级数学上册《知识解读·题型专练》(浙教版)福建省福州第十九中学2022--2023学年八年级上学期开学考试数学试题(已下线)11.1 三角形(题型精讲精练)-【题型分类精粹】2023-2024学年八年级数学上学期期中期末复习讲练系列【考点闯关】(人教版)安徽省安庆市第四中学2023-2024学年八年级上学期期中数学试题浙江省湖州市安吉县2023-2024学年八年级上学期期中数学试题贵州省黔东南州教学资源共建共享联合学校2022-2023学年八年级上学期期末模拟数学试题(已下线)专题04 认识三角形(八大题型)(题型专练)-2023-2024学年七年级数学下册《知识解读·题型专练》(苏科版)
名校
5 . 下列对ABC的判断,错误的是( )
A.若AB=AC,∠B=60°,则![]() |
B.若∠A∶∠B∶∠C=2∶3∶5,则![]() |
C.若∠A=20°,∠B=80°,则![]() |
D.若AB=BC,∠C=40°,则∠B=40° |
您最近一年使用:0次
2022-07-31更新
|
736次组卷
|
2卷引用: 重庆市育才中学2023-2024学年八年级上学期数学定时训练二
名校
6 . 下列对
的判断,错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.若![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() ![]() |
您最近一年使用:0次
2021-09-07更新
|
389次组卷
|
8卷引用:江苏省苏州市苏州中学2021-2022学年八年级上学期10月月考数学试题
江苏省苏州市苏州中学2021-2022学年八年级上学期10月月考数学试题山西省临汾市2021-2022学年八年级上学期段考数学试卷(二)山西省临汾市2021-2022学年八年级上学期阶段评估二(月考)数学试题江苏省苏州市相城区相城区蠡口中学2023-2024学年八年级上学期10月月考数学试题辽宁省盘锦市大洼区第二初级中学2023-2024学年八年级上学期第二次月考数学试题重庆市第七中学校2021-2022学年八年级上学期开学考试数学试题(已下线)第06讲 等边三角形的性质与判定-【暑假自学课】2022年新八年级数学暑假精品课(苏科版)河南省三门峡市渑池县2021-2022学年八年级上学期期末数学试题
7 . 如图,在
中,
,
,
分别为
,
边上的高,
,
相交于点
,连接
,则下列结论:
;
;
;
若
,则
周长等于
的长
其中正确的有______
写出所有正确结论的序号![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c42ed2e5bd5a0f033e24008697bf4963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f6e6f4067cc69039f1818344eb73d3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45bd00f1b2c6b150f0df9e5d7f4c2ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84bd5d78982af926fa945d6a52e792f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d8b8edd94bc4d5d517ec77e56800e41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b159f0833502ede6203e219d48874330.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c7b7be09862e90dd0065ec7b712e024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e1d0f65817ba32a732040518f41440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/6/56f7af6e-9c9a-45af-bf02-5ed66dd2e6bb.png?resizew=174)
您最近一年使用:0次
8 . 如图,在中,
分别是
的高线和角平分线,点F在
的延长线上,
垂直于
,交
于点G,交
于点H.下列结论正确的是
① ②
③ ④
您最近一年使用:0次
9 . 如图,在
中,
,
是
边上的高,
平分
交
于点E,交
于点 F,下面结论:①
;②
;③
;④
.其中正确结论的序号是_______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb576337b81841d9f1924c8b45c23aba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c073a41627962c1f7adc56b87245cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a49ff8dce1125e9ddcf4a9f9f9a1a9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b066ac2f598c911ab6b6bef9a1b61604.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/21/36d41e7f-5030-4186-84a9-7a0e550205d9.png?resizew=176)
您最近一年使用:0次
2023-11-08更新
|
54次组卷
|
3卷引用:山东省临沂市临沭县第五初级中学2023-2024学年八年级12月月考数学试题
山东省临沂市临沭县第五初级中学2023-2024学年八年级12月月考数学试题辽宁省鞍山市千山区2023-2024学年八年级上学期期中数学试题(已下线)清单04 垂直平分线、角平分线的性质与判定(11种题型解读(30题))-2023-2024学年八年级数学上学期期末考点大串讲(苏科版)
名校
10 . 如果三角形的两个内角与
满足
,那么我们称这样的三角形为“准直角三角形”.
(1)关于“准直角三角形”,下列说法:
①在中,若
,
,
,则
是准直角三角形;
②若是“准直角三角形”,
,
,则
;
③“准直角三角形”一定是针角三角形.
其中,正确的是_________.(填写所有正确结论的序号)
(2)如图①,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
(3)如图②,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2e30ffe627436f57ecf46b89c57bb21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
您最近一年使用:0次