在
和
中,
,且点
是
的中点,将
绕点
旋转,
与
交于点
.
(1)如图1,当点
为
的中点时,求
的长度;
(2)如图2,若点
刚好在
的平分线上,求
的长度;
(3)如图3,当
在
的上方,且
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17277a306d4d0a0a0cf293f87802cf66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5d3ecf9d9cd3962d7589f7e4b909c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17277a306d4d0a0a0cf293f87802cf66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf3d566704b44ea4ef1f99c37bd46902.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/15/1c48e647-8d1e-401d-ba09-a5c5c70c8724.png?resizew=530)
(1)如图1,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
(2)如图2,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
(3)如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17277a306d4d0a0a0cf293f87802cf66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ce2e057f17b7d9101637f48453c7bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
更新时间:2023-07-10 15:13:26
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在直角梯形ABCD中,AD∥BC,AB⊥AD,BC=CD,BE⊥CD,垂足为E,点F在BD上,连接AF、EF.
![](https://img.xkw.com/dksih/QBM/2013/6/19/1573664469196800/1573664475398144/STEM/fc0e4099ff0b4565a002c2bb45ca4c1c.png)
(1)求证:DA=DE;
(2)如果AF∥CD,请判断四边形ADEF是什么特殊的四边形,并证明您的结论.
![](https://img.xkw.com/dksih/QBM/2013/6/19/1573664469196800/1573664475398144/STEM/fc0e4099ff0b4565a002c2bb45ca4c1c.png)
(1)求证:DA=DE;
(2)如果AF∥CD,请判断四边形ADEF是什么特殊的四边形,并证明您的结论.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在
中,
,
平分
,交
于点
,过点
作
于点
.
;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a636611a8e4f2fa6256fa921a5158b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b44fa421d3ab01eee0d360a503bd212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971b23e3ee827018557d6c88edd5369a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a20e5d585fbf903ee5affa6d083ab95f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65e444dcae3fe7c0975428ee76728599.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3ee061bc43b327214ea7981a25137c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fb128c8247365e3d83d701c773b2a0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】(1)为了证明勾股定理,李明将两个全等的直角三角形按如图1所示摆放,使点
、
、
在同一条直线上,如图1,请利用此图证明勾股定理;
(2)如图2,
中,
,
,
,若点
从点
出发,以每秒
的速度沿折线
运动,设运动时间为
秒
,若点
在
的平分线上,求此时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1cd4a1c8087ef697d82b321a3331211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c545764505bb00578a870c5e39493a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce781fcab3b08eb3baafbca4a01bb8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4309cc517da10cf325b0003e50d8da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a363df9127fb019f87ec53470c50dcc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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解答题-问答题
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适中
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【推荐2】在平面直角坐标系中,A、B两点的坐标分别为A(1,a)、B(b,1),且实数a、b满足
=0.
(1)求a,b的值;
(2)平移线段AB至线段PQ处(A的对应点为P),使得点P、Q正好都在坐标轴上,求点P,Q的坐标;
(3)点C(3,c),c≠0,D是x轴负半轴上任一点,连接OC,OM平分∠DOC,ON⊥OM,(ON在x轴上方),CE⊥CO,交x轴正半轴于点E,当c的值发生变化时,探究∠NOD与∠OEC之间的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87f4375ec4719d83372eddee6ef90f2a.png)
(1)求a,b的值;
(2)平移线段AB至线段PQ处(A的对应点为P),使得点P、Q正好都在坐标轴上,求点P,Q的坐标;
(3)点C(3,c),c≠0,D是x轴负半轴上任一点,连接OC,OM平分∠DOC,ON⊥OM,(ON在x轴上方),CE⊥CO,交x轴正半轴于点E,当c的值发生变化时,探究∠NOD与∠OEC之间的数量关系,并说明理由.
![](https://img.xkw.com/dksih/QBM/2020/8/12/2526384350715904/2526927487819776/STEM/a3c2cd9e8a804135b0b150bd9f4c375d.png?resizew=434)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐1】在
中,
于点D,E为
的中点,连接
,与
交于点F,过点E作
,与
的延长线交于点N,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/28/eb0e128a-5879-4442-8f6f-c71efde3ca6f.png?resizew=119)
(1)依题意补全图形;
(2)用等式表示线段
、
、
之间的数量关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5797e3d68ea5c146b75a43736b41ea3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/28/eb0e128a-5879-4442-8f6f-c71efde3ca6f.png?resizew=119)
(1)依题意补全图形;
(2)用等式表示线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】在《阿基米德全集》中的《引理集》中记录了古希腊数学家阿基米德提出的有关圆的一个引理.如图,已知劣弧
,C是弦
上一点.
(1)根据提示完成尺规作图(保留作图痕迹,不写作法);
①作线段
的垂直平分线
,分别交劣弧
于点D,垂足为E;
②以点D为圆心,
长为半径作弧,交劣弧
于点F(F,A两点不重合),连接
.
(2)引理的结论为:
.
证明:连接
,
,
,
.
∴
为
的垂直平分线,
∴
,
∴
.
又∵四边形
为圆的内接四边形
∴
______
.( ).
又∵
,
∴
.
又∵
,
∴
__________,
∴
,( ).
∴
,
∴
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/d482efb8-88c2-4f57-8b50-29bbfe93add8.png?resizew=186)
(1)根据提示完成尺规作图(保留作图痕迹,不写作法);
①作线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
②以点D为圆心,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
(2)引理的结论为:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3daf661e72bddd36989339e7ebccf4c.png)
证明:连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.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/236c134aad7d9a21c49c07e924b9a531.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ed1b0a312e0ddf54abbbade60f2ca21.png)
又∵四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85719346f464a101d365d42be27450a3.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3194038ee0420f2d33cd9b436a2137.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e519cdb0cac3981d8e9610dba507a3.png)
又∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d17e725f7683a9e4aa36da4af5355fbd.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72a87b8360aea28f3f1eaab0abc620c6.png)
又∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fea80035c9751c04dafc7210c108e8a.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/906aa01c7fc5088e64fb0bc1f63cdefc.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/654f70e0727f5e539843e604782b0460.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f111108f1a1bb2d2598302223e01f9c.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3daf661e72bddd36989339e7ebccf4c.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,
中,
,
于点
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/30/a813297f-3265-47f1-b50f-ce5326f4c51e.png?resizew=319)
(1)求
,
的长;
(2)若点
是射线
上的一个动点,作
于点
,连接
.当点
在线段
上时,若
是以
为腰的等腰三角形,请求出所有符合条件的
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b6e4a2df58a236c20df5df0d29a466c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f042c8513aa0d73ed6706f6ac1b36880.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01cd2bf7c88e24c91625e0f20ba2a4bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ab299aff2cde34d381300f232d1056b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/30/a813297f-3265-47f1-b50f-ce5326f4c51e.png?resizew=319)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd5a1e516644950ef35eafd859b262f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】在平面直角坐标系中,点A(0,m)和点B(n,0)分别在y轴和x轴的正半轴上,满足
,连接线段AB,点C为AB上一动点.
![](https://img.xkw.com/dksih/QBM/2019/12/24/2361796680712192/2362218074587136/STEM/9fc5a395df4e43eabc76dfbde3113f81.png?resizew=168)
![](https://img.xkw.com/dksih/QBM/2019/12/24/2361796680712192/2362218074587136/STEM/57bec1d2a29d4f04bc4609746a740579.png?resizew=209)
(1)填空:m=_____,n=_____;
(2)如图,连接OC并延长至点D,使得DC=OC,连接AD.若△AOC的面积为2,求点D的坐标;
(3)如图,BC=OB,∠ABO的平分线交线段AO于点E,交线段OC于点F,连接EC.
求证:①△ACE为等腰直角三角形;
②BF-EF=OC.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/215e324dcf34b9783ba5ed3bf2da2b2a.png)
![](https://img.xkw.com/dksih/QBM/2019/12/24/2361796680712192/2362218074587136/STEM/9fc5a395df4e43eabc76dfbde3113f81.png?resizew=168)
![](https://img.xkw.com/dksih/QBM/2019/12/24/2361796680712192/2362218074587136/STEM/57bec1d2a29d4f04bc4609746a740579.png?resizew=209)
(1)填空:m=_____,n=_____;
(2)如图,连接OC并延长至点D,使得DC=OC,连接AD.若△AOC的面积为2,求点D的坐标;
(3)如图,BC=OB,∠ABO的平分线交线段AO于点E,交线段OC于点F,连接EC.
求证:①△ACE为等腰直角三角形;
②BF-EF=OC.
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