1 . 下列条件中不能判定三角形是直角三角形的是( )
A.![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.![]() ![]() |
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2 . 如图1,
,
与直线
,
相交,点
为直线
、
之间的一点.
(1)若
,
,求
的度数;
(2)如图2,在(1)的条件下,
平分
交
于点
,
平分
交
于点
,猜想
的结果并证明你的结论;
(3)如图3,在(1)的条件下,点
是射线
上一动点,作射线
并在射线
上取一点
,使得
,再作
的平分线交直线
于点
,则当
点在射线
上移动时,
的大小是否变化?若不变,请求出
的大小;若变化,请求出其变化范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/22/d17eb756-a8f4-49e3-a9a6-84d511ed1728.png?resizew=531)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64093789e118804b716d199e78a85005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b7151e1818a644d1fdb792c8f0fafac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19768d8c55deb4973820aeab7a224e6a.png)
(2)如图2,在(1)的条件下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d31cb19d4833eec524dc1d0bfdf97fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1460aa3d83df61f6c411b34412135451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cf0f03734e0d7e4de1d02f2e99b5124.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71ecd1bc6374d41b53c29fd4ffe35f97.png)
(3)如图3,在(1)的条件下,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65bb1c5af4c7a9376882867e07690b18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65bb1c5af4c7a9376882867e07690b18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5631a5a858720b0797c0b9e60d5c37ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd00e6b7626ee3fe3d9e59faacb58849.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74299e0d10eb2e529628daf5e5b2cba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74299e0d10eb2e529628daf5e5b2cba2.png)
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3 . 已知直线
,将一块含30°角的直角三角板
按如图所示方式旋转,若
,则
等于( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/10/6260dac0-dd06-4cc7-aa48-dbfa893767e3.png?resizew=178)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/027830fc47290062692964077ee481e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f88970462514d16fe46d66ca1d6540.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/10/6260dac0-dd06-4cc7-aa48-dbfa893767e3.png?resizew=178)
A.35° | B.45° | C.55° | D.65° |
您最近一年使用:0次
2023-07-27更新
|
115次组卷
|
17卷引用:四川省达州市渠县李馥中学2022-2023学年七年级下学期3月月考数学试题
四川省达州市渠县李馥中学2022-2023学年七年级下学期3月月考数学试题2020年山西省九年级中考线上大模考数学试题江西省上饶市广信区第七中学2019-2020学年七年级下学期期中数学试题2020年河南省信阳市中考数学5月模拟试题2020年湖北省襄阳市襄城区中考适应性考试数学试题山西省临汾市洪洞县2019-2020学年九年级中考数学大联考试题2020年海南省九年级毕业考试适应性训练试题河南省信阳市商城一中2020~2021学年八年级上学期月考数学试题(已下线)【万唯原创】2021年安徽面对面-题组-选填题组训练2(已下线)【万唯原创】2021年山西试题研究-练册-第四章12023年山东省泰安市东平县实验中学九年级下学期第一次模拟考试题 江西省九江市修水县2022-2023学年七年级下学期期末数学试题辽宁省鞍山市海城市孤山镇初级中学2022-2023学年九年级下学期4月月考数学试题辽宁省鞍山市岫岩满族自治县2022-2023学年九年级下学期4月月考数学试题山西省大同市第三中学校2023-2024学年八年级上学期第一次月考数学试题(已下线)专题7.17 认识三角形(题型分类拓展)-2023-2024学年七年级数学下册基础知识专项突破讲与练(苏科版)2024年山东省济南市莱芜区九年级中考数学模拟试题
4 . 在
中,
,
是直线
上一动点(不与点
,
重合).
(1)如图1,若
,点
在边
上,
交
于点
,
交
于点
.若
,求
的度数.
(2)如图2,若
,点
在边
上,
,交直线
于点
,交直线
于点
.
①线段
,
,
三者之间的数量关系是___________;
②若点
在
的延长线①中的结论是否成立?若成立,请给出推理过程;若不成立,请画出图形,并直接写出
,
,
三者之间的数量关系.
③若点
在边
上,且
,请判断
,
,
三者之间的数量关系,并说明理由.
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/4/4712f891-f755-4aef-858b-a5b44ced76eb.png?resizew=298)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ee7149bd58649b5c8b84439e118e53.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/32c38dfd14dde969702dff97ef2270f9.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/58cc90fee532e50d319081d571410421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e71378175f13d65c1f0558924d2a85f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3b0b11a80e8b107e55534d7fda9f2b.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.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/9b937442ad4cc480adc11bb143559454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
①线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
②若点
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
③若点
![](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/b68e31c0164696680d71f98ad8834618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次
5 . 如图,在
中,
,
为
边上的高,
平分
,点F在
上连接
并延长交
于点G,若
,
,有下列结论:①
;②
;③
;④
;⑤
.其中一定成立的有( )
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246a86f34603eaf2e6a948681b831b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4809e704d4ba1b026f2f5897c2a0513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aed7d2d56c94b0200537543ac5d116c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee710693a0f5ab1cbdc52cfe1498b51a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d48ce1534d774261c3d19529598121a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c13ab7f17263c4e6163d960f1c5060.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df1ac3ab8d3ce5e61fd2f89761f80976.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c55ee522f41c43253050e92b3c8de31.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/26/32c5d1d5-008e-4c0c-9840-a4a5121b9251.png?resizew=147)
A.5个 | B.4个 | C.3个 | D.2个 |
您最近一年使用:0次
2023-07-24更新
|
220次组卷
|
3卷引用:四川省达州市开江县2022-2023学年七年级下学期期末教学质量监测数学试题
6 . 如图,在
中,按以下步骤作图:①分别以点B和点C为圆心,大于
的长为半径作弧,两弧相交于点M和N,连接
,分别与
,
交于点D和E;②以点A为圆心,任意长为半径作弧,交
于点G,交
于点H;③分别以点G和点H为圆心,大于
的长为半径作弧,两弧相交于点P;④作射线
,分别交
,
于点F,Q.若
,
,则
的度数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d452f74791f58e8400cb8d2d6038dc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/1f01b7488c22afe63b1b80e27169bfdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640e9e7c56e8eeda044fb55396088816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998329f9cdb86f5d60d7d5d70fc3781e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b858c70410f981ca3e22f791585c7e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/26/73ca3e94-0403-4bd7-b62c-f8c95a85e31f.png?resizew=151)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
7 . 如图是一张直角三角形纸片
,
,
,将
折叠使点B和点A重合,折痕为
,则
的度数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640e9e7c56e8eeda044fb55396088816.png)
![](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/5157b42da58d55daad27d98b2fec15ff.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/26/c3cde247-7845-4e7f-8d3d-c58f4c967336.png?resizew=182)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
8 . 已知:如图,
,
与
交于点E,
,求∠F的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa83c55d5ef41f00412eb83b9beccd0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68e20915690733acd094e7675afda8fd.png)
![](https://img.xkw.com/dksih/QBM/2023/7/16/3282118465290240/3285114674192384/STEM/4ac7654801f143afbfb3f64cb73c6121.png?resizew=273)
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名校
9 . 满足下列条件的
,不是直角三角形的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-07-19更新
|
165次组卷
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9卷引用:四川省达州市渠县第二中学2022-2023学年八年级上学期月考数学试题
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10 . 若
的三边分别为
,下列给出的条件不能使得
构成直角三角形的是( )
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
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