1 . (1)如图(a),
平分
,
平分
.
①当
时,求
的度数.
②猜想
与
有什么数量关系?并证明你的结论.
(2)如图(b),
平分外角
,
平分外角
,(1)中②的猜想还正确吗?如果不正确,请你直接写出正确的结论(不用写出证明过程).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a6f36741b86f464be362b12bac13d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c543c3ddc3723fde6bbfca3ea3b921b.png)
②猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c543c3ddc3723fde6bbfca3ea3b921b.png)
(2)如图(b),
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a91f89a0bc06bd1613e4ec4011e6755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7f5a489ae020c8dce70ad9456603df0.png)
![](https://img.xkw.com/dksih/QBM/2020/5/8/2458365981171712/2459156609679360/STEM/e2a249f475e1412fbad94d12bd07126b.png?resizew=459)
您最近一年使用:0次
2 . 如图,点
在
的延长线上,
与
交于点
,且
,
,
,
为线段
上一动点,
为线段
上一点,且满足
,
为
的平分线.下列结论:①
;②
平分
;③
;④
.其中结论正确的有______ (写出所有正确结论的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eef1d9596f7d3507b989c74ecd2eae22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4354365ca0929f8a606ed0bf341e4ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6031dd328b1852e40e28978320acbf17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7c14050acd1cf1c9ff6ee90b3f07f58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d19304561bed6d1da08860a4ccfa714.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632917e61f4208959686d118c7f19231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36ec7243073566a0ab60a58271970f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b1af70547010f4dcfdc1e573dfa2420.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94c421251942c000c8cb563bd6a71eb.png)
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3 . 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
4 . 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
5 . 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
6 . 如图,在
中,
,分别以
,
为底边在
上方作等腰直角三角形
和等腰直角三角形
,连接
并延长交
于点F.
现给出以下结论: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/047dc9795efa99b6fb9fdf9778085dab.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/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
现给出以下结论:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8abfdaab699cfe51bb9678110ad6aee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/941edf90b7be8365141ef4f4f1b906c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090b2575658e8d143b4bcca5244b2e3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7faabc484ce3666706c1beffda4bcfe2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/67a3d42b-3a2b-422a-bd9f-429e4ba053f1.png?resizew=128)
您最近一年使用:0次
名校
7 . 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: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
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)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
8 . 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
9 . 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
10 . 如图,把
放到平面直角坐标系
中,使得
,
.点
在
轴上且
.那么下列结论正确的是________ (填写序号).
①
;②
;③
;④
;⑤
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc8362d054a769c541ee707e0c06cc10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d660ced5a492a37056b08b858e199320.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d85ba9942c79b942388db17a47a7da6a.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa50346237f69307a6f08037562e67e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc045e53575a5332b65da11af812394a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faf656518747f3ef4bf1a3014f1997f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/947ab52c69e1bf1ce55c2f49e9f57fc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8a8257c3e0ee20cd4626656af4af91.png)
您最近一年使用:0次