如图,在
中,
,
,
是
的平分线,交
于点
,
是
的中点,连接
并延长,交
的延长线于点
,连接
.求证:
(1)
;
(2)
.
![](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/236c72942e305dfdede4b4f44c650e59.png)
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/7/4cacd98c-b5c9-4ee1-b5a0-fc1588e321c8.png?resizew=200)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab00e0cff0876c4183a47f1272cf9928.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c30872f0bea299dbe96d13d727f92061.png)
更新时间:2023-11-06 18:48:11
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】(1)如图1,已知O是直线CD上的点,OA平分∠BOC,OE平分∠BOD,∠AOC=35°,求∠BOE,∠COE的度数.
(2)如图2,已知AB=16cm,C是AB上一点,点D是线段AC的中点,点E是线段BC的中点,求线段DE的长度.
(2)如图2,已知AB=16cm,C是AB上一点,点D是线段AC的中点,点E是线段BC的中点,求线段DE的长度.
![](https://img.xkw.com/dksih/QBM/2018/1/19/1863631091441664/1865269016944640/STEM/cfc3e9f32a704e86af3d7d57c283c5e5.png?resizew=424)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】已知:如图,在四边形
中,
,点E在直线
上,点F在直线
上,且
.
(1)如图①,若
平分
,求证:
;
(2)如图②,若
平分四边形
的外角,其余条件不变,则(1)中的结论是否仍然成立?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f852e538067ee02d6c62b45bc8a531df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32a102fce856cb59f54e626c92a789fb.png)
(1)如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/992a19339adac3a2f1aab1fbc11b1c68.png)
(2)如图②,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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解答题-证明题
|
适中
(0.65)
【推荐1】如图,在△ABC中,∠BAC=90°,∠C=30°,AD⊥BC于D,∠ABC的平分线分别交AD,AC于点F,E,求证:△AEF是等边三角形.
![](https://img.xkw.com/dksih/QBM/2022/9/22/3071988145872896/3091612932841472/STEM/acc6a928e73d4e208327eb0d8ef24dd5.png?resizew=248)
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解答题-作图题
|
适中
(0.65)
【推荐2】在
中,
,
,
的平分线
交
于点E,
,垂足为B.
(1)根据题意画出图形;
(2)求
和
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a70f42dccbe717bd85872938e26412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b455b110a30c1533d0a0657e0e48ac33.png)
(1)根据题意画出图形;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c543c3ddc3723fde6bbfca3ea3b921b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a71e8a816d9ef65d4bffd81fd53216.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
名校
【推荐1】如图,直线
,线段
分别与直线
、
交于点
、点
,满足
.
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898551777001472/2901393862631424/STEM/ccb12b31-668a-4d5d-bbb2-40625bfca88c.png?resizew=205)
(1)使用尺规完成基本作图:作线段
的垂直平分线交
于点
,交
于点
,交线段
于点
,连接
、
、
、
.(保留作图痕迹,不写做法,不下结论)
(2)求证:四边形
为菱形.(请补全下面的证明过程)
证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b68befb643816b6d976d929703db4db.png)
____①____
垂直平分![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6d83c05bd76241895c0e5709b533b84.png)
∴____②____![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cacb9c6e7d1a54e3d5b19e153ca04128.png)
____③____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e9dd6147fd83173b71cc7467e481b3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae11a8b2a15d9adc19274b551c431a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf6927316695fe5c734f69410c95fdc2.png)
∴四边形
是___④_____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39cc45c88b67f721cb7a09d889659992.png)
∴四边形
是菱形(______⑤__________)(填推理的依据).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/027830fc47290062692964077ee481e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898551777001472/2901393862631424/STEM/ccb12b31-668a-4d5d-bbb2-40625bfca88c.png?resizew=205)
(1)使用尺规完成基本作图:作线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a477603f3f88c3b48352b6130f9ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(2)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48a61d8bedef61745ee4fd89a8c0c119.png)
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b68befb643816b6d976d929703db4db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b8b514fa233dfa2dabd7ffb5f02e4e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173f7d26d069c0f16a0f6fcb517aa28c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2444fdccd9d7272195635c0d0db642dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6d83c05bd76241895c0e5709b533b84.png)
∴____②____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cacb9c6e7d1a54e3d5b19e153ca04128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed994f4b9c09293b3f972f1a808e21f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e9dd6147fd83173b71cc7467e481b3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae11a8b2a15d9adc19274b551c431a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf6927316695fe5c734f69410c95fdc2.png)
∴四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48a61d8bedef61745ee4fd89a8c0c119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39cc45c88b67f721cb7a09d889659992.png)
∴四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48a61d8bedef61745ee4fd89a8c0c119.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】已知∠ABP=25°.
(1)按以下步骤尺规作图(保留作图痕迹):
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/5/a74dd535-fd4c-4feb-b87e-07cdae66a4e0.png?resizew=198)
①分别以A,B为圆心,以大于
AB的长为半径作弧,两弧相交于点E、F;
②作直线EF交BP于点D,连接AD;
③作AC=AD,AC与BP交于点C.
(2)求∠CAD的度数.
(1)按以下步骤尺规作图(保留作图痕迹):
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/5/a74dd535-fd4c-4feb-b87e-07cdae66a4e0.png?resizew=198)
①分别以A,B为圆心,以大于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
②作直线EF交BP于点D,连接AD;
③作AC=AD,AC与BP交于点C.
(2)求∠CAD的度数.
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解答题-问答题
|
适中
(0.65)
名校
【推荐1】如图,在
中,
,
,点
,
分别在坐标轴上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/d997bb86-e5cc-4e87-9779-44f782acaad6.png?resizew=518)
(1)如图1,若点
的横坐标为
,求点
的坐标.
(2)如图2,若
轴恰好平分
,
交
轴于点
,过点
作
垂直
轴于
点,试猜想线段
与
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/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/d997bb86-e5cc-4e87-9779-44f782acaad6.png?resizew=518)
(1)如图1,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edbd40e04e2a943051fa83d6e511add.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】如图,在平面直角坐标系中,点
、
的坐标分别为
和
,点
是
轴上的一个动点,且
、
、
三点不在同一条直线上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/8d784761-94cd-44e5-8c5e-b5d4e0561b6b.png?resizew=180)
(1)求出
的长.
(2)若
时,求点
的坐标.
(3)求出
的周长的最小值?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b69abe959988e4c8c0739f5857ccfb0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c3a2f5b0702ea9fbb9dc8904579737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/8d784761-94cd-44e5-8c5e-b5d4e0561b6b.png?resizew=180)
(1)求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(3)求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次