如图,
是等边三角形
内一点,
,
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bbd51bf88cade2c3c37a0720b2e0781.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0b73db43b2ded725b5ec0fde022b32c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f152347bed31f86d4f58b24128a9eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc3960600b822b00678363f7882edc1e.png)
22-23八年级下·湖北咸宁·阶段练习 查看更多[3]
湖北省咸宁市崇阳实验中学2022-2023学年八年级下学期月考数学试题湖北省咸宁市崇阳县实验中学2022-2023学年八年级下学期月考数学试题(已下线)专题09平行四边形的判定(六大题型)-【好题汇编】备战2023-2024学年八年级数学下学期期中真题分类汇编(人教版,湖北专用)
更新时间:2023-09-19 12:49:33
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相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,已知
为等边三角形,
为
上一点,
为等边三角形.
![](https://img.xkw.com/dksih/QBM/2020/3/8/2415279297724416/2416026873249792/STEM/cd009c2725004b1d87336430678e13ae.png?resizew=187)
(1)求证:
;
(2)
与
能否互相垂直?若能互相垂直,指出点
在
上的位置,并给予证明;若
与
不能垂直,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](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/ecc3919b5000f9af77ddb77a62bee9c9.png)
![](https://img.xkw.com/dksih/QBM/2020/3/8/2415279297724416/2416026873249792/STEM/cd009c2725004b1d87336430678e13ae.png?resizew=187)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebd80daf6926ff467cf83281c50030ef.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](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/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
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解答题-作图题
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适中
(0.65)
【推荐2】【教材呈现】下图是华师版九年级上册数学教材第77页的部分内容.
猜想
如图.在
中,点D、E分别是
与
的中点,根据画出的图形,可以猜想:
,且
.
对此,我们可以用演绎推理给出证明.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/9ffd0919-8220-4a6c-940a-8178ec86aa77.png?resizew=132)
请写出证明过程.
【结论应用】如图,
是等边三角形,
,连结
,M、N、P分别为
的中点,顺次连结M、N、P.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/4915a44a-cc8b-4219-98a2-10a39b2a815b.png?resizew=140)
①求证:
;
②直接写出:
______度.
猜想
如图.在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/950e82a0f9712457f2dd9f8a93f8a217.png)
对此,我们可以用演绎推理给出证明.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/9ffd0919-8220-4a6c-940a-8178ec86aa77.png?resizew=132)
请写出证明过程.
【结论应用】如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/723390b540c7077f7f386219369aa1c4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/4915a44a-cc8b-4219-98a2-10a39b2a815b.png?resizew=140)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fc2d041d2d0e7f92645f8aa7ae4db97.png)
②直接写出:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/488799ec448230782aa303fc90f2a414.png)
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解答题-作图题
|
适中
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名校
【推荐1】如图,在
中,
,点D在边
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/30/92a9d837-7dff-4a8f-9493-84f566bc0df9.png?resizew=162)
(1)求作:点E.使四边形
是平行四边形;(要求:尺规作图,不写作法,保留作图痕迹)
(2)以(1)中
的边
为直径作
交
的延长线于点F,若
.求证:
.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/30/92a9d837-7dff-4a8f-9493-84f566bc0df9.png?resizew=162)
(1)求作:点E.使四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
(2)以(1)中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f6b2985eccf6fa89b362ea0abb3591.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46ce838f38419e8781d63b3417cac5e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7322382eecd41e1348226680a830da9a.png)
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解答题-问答题
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适中
(0.65)
【推荐2】如图,
,
是
的高,
,
相交于点
,
是
的中点,
是
的外接圆.
(1)点B,C,D,E是否在以点M为圆心的同一个圆上?请说明理由.
(2)若
,
,求
外接圆的半径长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/6/b2ddc2a3-e46e-4cc8-8f8d-9225ec2658e1.png?resizew=318)
(1)点B,C,D,E是否在以点M为圆心的同一个圆上?请说明理由.
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56512504254ab7f574a717dd6830fb33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次