解答
(1)问题背景
如图(1),已知
,
平分
,求证:
.
(2)尝试应用:
如图(2),在四边形
中,
,点
是
的中点,若
是
的平分线,试判断
,
,
之间的数量关系,并证明你的结论.
(3)拓展创新:
如图(3),在四边形
中,
,
与
的延长线交于点
,点
是
的中点,若
是
的平分线,试探究
,
,
之间的数量关系,请直接写出你的结论.
(1)问题背景
如图(1),已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212bfbd5575772ca36d6fc3e7b246e49.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/26/33eafd3f-c65c-46c7-9f8b-ce94b5955afa.png?resizew=124)
(2)尝试应用:
如图(2),在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/26/b660c812-2124-4a14-b245-a849e8d95349.png?resizew=136)
(3)拓展创新:
如图(3),在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac37366d2b54dc7d9a95ac6ddda5f3a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/26/cc6c5239-8116-4e93-9d99-ee9578c66587.png?resizew=180)
更新时间:2023-07-25 05:42:20
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】平面内的两条直线有相交和平行两种位置关系
![](https://img.xkw.com/dksih/QBM/2022/4/5/2951842061942784/2962847151554560/STEM/36171a11-448e-430e-8729-405b7e8ed4fb.png?resizew=318)
(1)AB//CD.如图a,点P在AB、CD外部时,∠B,∠BPD,∠D之间有何数量关系?请说明理由
(2)如图b,将点P移到AB、CD内部,∠BPD、∠B、∠D之间又有何数量关系?请说明理由
![](https://img.xkw.com/dksih/QBM/2022/4/5/2951842061942784/2962847151554560/STEM/36171a11-448e-430e-8729-405b7e8ed4fb.png?resizew=318)
(1)AB//CD.如图a,点P在AB、CD外部时,∠B,∠BPD,∠D之间有何数量关系?请说明理由
(2)如图b,将点P移到AB、CD内部,∠BPD、∠B、∠D之间又有何数量关系?请说明理由
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1,在平面直角坐标系中,点A,B的坐标分别为
,
,现同时将点A,B分别向上平移2个单位长度,再向右平移1个单位长度,得到A,B的对应点C,D,连接
,
,
.
的面积.
(2)在x轴上是否存在一点F,使得三角形
的面积是三角形
面积的2倍,若存在,请求出F的坐标;若不存在,请说明理由.
(3)如图2,点P是直线
上一个动点,连接
,
,当点P在直线
上运动时,请直接写出
与
,
的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c3a2f5b0702ea9fbb9dc8904579737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f8abda6a85e7ef6f281fc2df853fa.png)
(2)在x轴上是否存在一点F,使得三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44b34f6deecbc80481218e1e901f788.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/138a5261a4cd0cb1f14b1dfccd4d916d.png)
(3)如图2,点P是直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30d59283eb55b461ac1347e8ef446048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d221944148d71e2e1bc76040aefb8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfe03153118b0d29d0ab915e5dbe601e.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,在平面直角坐标系中,直线
与x,y轴分别交于
,
,以
为斜边作等腰
.
的解析式;
(2)如图2,动点E从点O出发,以每秒1个单位长度的速度沿x轴的正方向匀速运动,动点F从点A出发,以每秒3个单位长度的速度沿x轴的负方向匀速运动,E、F两点同时运动.在运动过程中,以
为斜边在x轴上方作等腰
.设运动时间为t秒;
①点E的坐标______,点F的坐标______.(用含t的式子表示)
②当点E在点F左侧时,若点G落在直线
上(如图3),求t的值;
③以
为直角边,点G为直角顶点作等腰
(点C、点G、点D逆时针排列).当点D落在x轴上时,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9703cc262fd0f2ab62ab1bb91313b3c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86acf63b2b7c89ccb8c47244b325f273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ded5655c85b7f4a6e354e8670530098.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)如图2,动点E从点O出发,以每秒1个单位长度的速度沿x轴的正方向匀速运动,动点F从点A出发,以每秒3个单位长度的速度沿x轴的负方向匀速运动,E、F两点同时运动.在运动过程中,以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80eff52574ec119d2f52fa165da837ec.png)
①点E的坐标______,点F的坐标______.(用含t的式子表示)
②当点E在点F左侧时,若点G落在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
③以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0afa09c4569267d5d5c594598e89174.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图1,已知平行四边形
,点
为边
的中点,连接
并延长交
的延长线与点
,连接
.
是平行四边形.
(2)如图2,当
时,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c6199bb5cea6bad4fe1cde57c5cb1ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9186e4574ffe28e673724fcb019db208.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aed03275817bf753b089115c1f25c7e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐1】如图,
中,
,
,
的角平分线
交
于点E.点D为
上一点,且
,
,
交于点M.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/20/f0e0883a-cf34-47fa-a192-532a5cc3882a.png?resizew=179)
(1)求
的度数;
(2)若
于点H,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bf3bb6fc265edb63e78dab2a6dd3bed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc13fe21e64d9b45614ed43be847904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/20/f0e0883a-cf34-47fa-a192-532a5cc3882a.png?resizew=179)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a433a47da376e4a3f66af52b63351f84.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6f584802de2e7335d5b6ba33c9ac50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b1927db96d84f27197b5a654b622f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83042953e7f15e984b2da2ee9ca678d1.png)
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,△ABC中,∠ABC=45°,AD为△ABC的高,点E在边AC上,BE与AD交于点F,且DF=DC.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/9/de417a4d-19d4-4ae4-bd4d-5b8f4bbccc68.png?resizew=166)
求证;(1)BF=AC;
(2)BE
AC.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/9/de417a4d-19d4-4ae4-bd4d-5b8f4bbccc68.png?resizew=166)
求证;(1)BF=AC;
(2)BE
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐1】如图所示,已知△ABC:①过A画出中线AD;②画出角平分线CE;③作AC边上的高BF
![](https://img.xkw.com/dksih/QBM/2019/6/17/2227558671851520/2228522107641856/STEM/b640b80602e94e5793bf2c85ba6b5d71.png?resizew=205)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,等腰△ABC中,
,
交BC于D点,E点是AB的中点,分别过D,E两点作线段AC的垂线,垂足分别为G,F两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/15/40461405-becc-4abf-a543-08a9b7799e87.png?resizew=181)
(1)求证:四边形DEFG为矩形;
(2)若
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/15/40461405-becc-4abf-a543-08a9b7799e87.png?resizew=181)
(1)求证:四边形DEFG为矩形;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/613dedf2d90e58591b7ac4a250ac7b5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cba0f25d81e1c8ff411293d2a8d229c.png)
您最近一年使用:0次