1 . 如图,在
中,
和
的平分线
,
相交于点O,
交
于点E,
交
于点F,过点O作
于点D.下列四个结论:①
;②当
时,
;③若
,
,则
;④若
,则
.其中所有正确结论的序号是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/813bb072-2fff-4460-b5ef-fcf7afd36c64.png?resizew=168)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7251d14111473460f02a65c7531c51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a60dcb315cac91b4d73339a01bb1d26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998329f9cdb86f5d60d7d5d70fc3781e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03fec125865aeb248bc20271089034ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea64b61bba2211068b9057ff24d77fa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c6459ac05aa3e678cf8efc8c636887b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f03480d343e1f44f4c61f232f5e4764.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da4285dd4f5c36e7434b433a1f7231a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/813bb072-2fff-4460-b5ef-fcf7afd36c64.png?resizew=168)
A.①② | B.②③ | C.①②③④ | D.①③④ |
您最近一年使用:0次
名校
2 . 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
|
393次组卷
|
8卷引用: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
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(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)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
3 . 若△ABC的三边长分别为a,b,c.下列条件:①∠A=∠B﹣∠C;②a2=(b+c)(b﹣c);③∠A:∠B:∠C=3:4:5;④a:b:c=5:12:13.其中能判断△ABC是直角三角形的是_____ (填序号).
您最近一年使用:0次
2019-11-30更新
|
262次组卷
|
5卷引用:江苏省盐城市建湖县2019-2020学年八年级上学期期末数学试题
4 . 阅读下面材料:
已知:
,
,
,点
是
中点,给出下面四个结论:
①
;
②
;
③
;
④点
是
上的一个动点,当
取最小值时,
.
上述结论中,所有正确结论的序号是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/12/159ed6b6-95c9-480a-839b-e7fbc79684af.png?resizew=184)
已知:
![](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/2fb01d2b57580731c8b807ac8cffc8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e051da5c8aea7ef4a467bfaa07256b7.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a58a622e2b1a239f2f96aa1501e9799.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e232e78cf783bc2028d658b2c27a5d.png)
④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/d754f5b394263f5089f76a64311b0f71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ccaba8c8bdc8ff3ed19f9c43ed3c199.png)
上述结论中,所有正确结论的序号是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/12/159ed6b6-95c9-480a-839b-e7fbc79684af.png?resizew=184)
A.①②④ | B.②③ | C.③④ | D.②③④ |
您最近一年使用:0次
5 . 如图,把一副三角板
与
按如图所示的方式拼接在一起,其中
,
,
,
,
三点在同一条直线上,
为
的角平分线,
为
的角平分线.下列结论:①
;②
;③
;④
.其中正确结论的序号是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6414089941feb5d8a4a6a49566b9ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d29e7c4d6216690152430b09f9cf0c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b153c6ae8a0fb025329c97cd74d5bc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/573a7e9d8bfcab2aa1550b1b870036e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44ac3a46b7c0a0dbb74ef727ad4555b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc5f0e2cc2158bd508edd68e05a892b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/f6ef411f-fe39-42bc-80ab-8dbb7cd5afc9.png?resizew=127)
您最近一年使用:0次
6 . 在
中,
,
的平分线交于点O,
外角平分线所在的直线
的平分线相交于点
,与
的外角平分线相交于点E,则下列结论一定正确的是______ .(填写所有正确结论的序号)
①
;②
;③
;④
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ebe4c425939ccbf0ff723d8c2468da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2217de2d19252626acd34637378d194.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfbb9f3b6f6c37e6a4becafd0417ade1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebd15a223c9664cc7436ae14bfd30c36.png)
![](https://img.xkw.com/dksih/QBM/2023/9/15/3325513788334080/3327601390526464/STEM/c238ad2bcee14735ac365864fcf4ca4d.png?resizew=195)
您最近一年使用:0次
7 . 如图,在
中,
,
平分
,
于点
,
于点
,且与
交于点
,
于点
,且与
交于点
.则下面的结论:①
;②
;③
;④
.其中正确结论的序号有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/dd37183c-7345-4618-ad4b-ce06f287715c.png?resizew=148)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27e47690ed332c573186992b6d25654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d320f180419175d75eebc618cc458b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc90fee532e50d319081d571410421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c114237f609956017bc72f4971d5b375.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f93040d344eade19fd2378d6829b079.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78eb5b388afc0437ec7805c5608ebe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c61337350ae05a3f5b27699683d72cd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/dd37183c-7345-4618-ad4b-ce06f287715c.png?resizew=148)
A.①②③ | B.①②④ | C.②③④ | D.①③④ |
您最近一年使用:0次
8 . 如图,在
中,
,高
与角平分线
相交于点
,
的平分线
分别交
,
于点
,
,连接
,下列结论:①
;②
;③
;④
,其中所有正确结论的序号是( )
![](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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721c75fcd58d3d54260aad0f82e09e37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52e58b51375b57ff98b278e7af04c8f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4862047688bcd39cac840955f14af05e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61725f91ee0a91e753ffe7dd0a141cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8816bddd721946b7fa96f19451d8ee6a.png)
A.①②④ | B.②③ | C.③④ | D.②③④ |
您最近一年使用:0次
9 . 如图,
,
、
、
分别平分
、
、
,有下列结论:①
;②
;③
;④
与
互余.其中,结论正确的是______ .(只填序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6a23d521606a35298bbf147f7f830c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2ee75a234ac05a3225e49ddd8c5065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73f68e4414c9ab464bf433385c03705f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982f824aa56c399260dcf6e83d169344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1151bc2391d36421aff249891c1600c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f7fb34f352e877cac3ba6c4c668c22c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7d6902c8862bd2616be038549f77aff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b6e4330927acd53f2006bb60b6a1be8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/87ae7c1b-c970-4574-b582-29221107e1ab.png?resizew=171)
您最近一年使用:0次
10 . 如图,在
中,
,
,
为线段
上一动点
不与点
、点
重合
,连接
,作
,
交线段
于点
以下四个结论:
;
当
为
中点时,
;
若
,则
;
当
为等腰三角形时,
其中正确的结论有______
填写正确结论的序号![](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/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640e9e7c56e8eeda044fb55396088816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](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/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9608cad892644b4094ed6438b69572.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/6f70e392e12ac3eed1b5e46888db4e01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3afa3bea496bfa318480a2c3d62822e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82e415812cca9545611c0faa0c01b1c.png)
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