在矩形
中,点E为射线
上一动点,连接
.
边上时,将
沿
翻折,使点B恰好落在对角线
上点F处,
交
于点G.
①如图1,若
,求
的度数;
②如图2,当
,且
时,求
的长.
(2)在②所得矩形
中,将矩形
沿
进行翻折,点C的对应点为C',当点E,
,D三点共线时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
①如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983a45a4ef187b9cb0682d59a9dcfeaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90026b96116424a245b335b1adb886b.png)
②如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fa1b5b6051d500fe6c6f1c19c7ee49f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)在②所得矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
2022·四川成都·三模 查看更多[10]
2022年四川省成都市武侯区西川中学中考数学三诊试卷(已下线)2023年四川省成都市青羊区一诊数学试题变式题21-26题(已下线)黄金卷5-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷(四川成都专用)2023年浙江省绍兴区柯桥区中考一模数学试题2023年山东省德州市夏津县中考二模数学试题2023年湖北省天门市中考模拟数学试题(3)(已下线)九年级数学上学期期中测试卷01(北师大版,九上全册)-2023-2024学年九年级数学上学期期中期末考点归纳满分攻略讲练(北师大版)广东省深圳市宝安中学(集团)初中部2023-2024学年九年级下学期开学考数学试题(已下线)难点05 相似三角形综合(与三角形综合,与四边形综合)-2024年中考数学【热点·重点·难点】专练(四川成都专用)2024年河南省周口市沈丘县押题密卷联考中考三模数学试题
更新时间:2023-12-24 16:53:53
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】如图,在
中,
的平分线交
于点E,以A为圆心,
为半径作
交
于点F,直线
交
于G、H两点,
的延长线交
于点D,作
,垂足为点K.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/e21855b8-61cb-461e-8e92-9b24b3f325ef.png?resizew=203)
(1)求证:
;
(2)求证:
;
(3)当
且
时,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/117981f87d30073ff1f0a3890235a3b6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/e21855b8-61cb-461e-8e92-9b24b3f325ef.png?resizew=203)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33530f6f06cb219d600f93fb2c92de0.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f792acf7146c265b0fa8ff01a8bff4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cd3a1d593b9cd662576d81a774f9114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa4b34b13c48918c7ee7af31b45375da.png)
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解答题-问答题
|
较难
(0.4)
【推荐2】点P是边长为3cm的等边△ABC的边AB上的动点,点P从点A出发.沿线段AB向点B运动.
![](https://img.xkw.com/dksih/QBM/2020/10/4/2563737666428928/2565199386050560/STEM/cf9b24f6ec1b4581a67bbacb0b0ef75d.png?resizew=404)
(1)如图1,若另一动点Q从点B出发,沿线段BC向点C运动,如果动点P,Q都以1cm/s的速度同时出发,设运动时间为t(s),连接AQ、CP交于点M,
①当t为何值时,△PBQ是直角三角形?
②在P,Q运动的过程中,∠CMQ会发生变化吗?若变化,则说明理由,若不变,则求出它的度数.
(2)如图2,若另一动点Q从点C出发,沿射线BC方向运动,连接PQ交AC于点D,如果动点P,Q都以1cm/s的速度同时出发,设运动时间为t(s),连接PC,
①当t为何值时,△DCQ是等腰三角形?
②在点P,Q的运动过程中,请探究△PCD和△QCD的面积之间的数量关系.
![](https://img.xkw.com/dksih/QBM/2020/10/4/2563737666428928/2565199386050560/STEM/cf9b24f6ec1b4581a67bbacb0b0ef75d.png?resizew=404)
(1)如图1,若另一动点Q从点B出发,沿线段BC向点C运动,如果动点P,Q都以1cm/s的速度同时出发,设运动时间为t(s),连接AQ、CP交于点M,
①当t为何值时,△PBQ是直角三角形?
②在P,Q运动的过程中,∠CMQ会发生变化吗?若变化,则说明理由,若不变,则求出它的度数.
(2)如图2,若另一动点Q从点C出发,沿射线BC方向运动,连接PQ交AC于点D,如果动点P,Q都以1cm/s的速度同时出发,设运动时间为t(s),连接PC,
①当t为何值时,△DCQ是等腰三角形?
②在点P,Q的运动过程中,请探究△PCD和△QCD的面积之间的数量关系.
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐1】
中,
,D为
边的中点,连接
.
,
,求
的面积;
(2)如图2,
,
为
上一点,将
绕点D顺时针旋转
得线段
,作
交
的延长线于点
,如果
,求证:
;
(3)如图3,
,
为
上一点,将
绕点
顺时针旋转
得线段
,当
最小时,
为平面内一点,将
沿
翻折得
,当
最大时,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7099026716ee1821dd7d9f157dc055f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a3f63b57ce0e1a940187849f82e555a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4da6d55f36613f4c677d479358fce6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a329bec5627bf0eb930d1406ac13e483.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89a066ab1913da11315bde7ae93783f1.png)
(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec3469df8eb9b5c63be3cda21b7d6d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1bd75fbe8bec72e27a3b3b6d48f138.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450c283be75828707be7a0fb5922a730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c91725cdcd86f28060277a45dd5285.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64380e71ac9a55fc3effe4da326e17be.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
解题方法
【推荐2】如图,四边形ABCD和四边形AEFC均为菱形,且
.
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893449871458304/2951581459341312/STEM/5b0a978bd8164d93b0161d80b99dc487.png?resizew=498)
(1)问题引入
如图1,点E、G分别为边AB、AD上两点,且
,连接CF.
①BE、CF之间的数量关系为__________
②延长CF、BE交于点O,则
__________;
(2)拓展探究
将图1中的菱形AEFG绕点A顺时针旋转
得到图2,连接BE并延长交CF的延长线于点O,试探究BE与CF之间的数量关系,并求出
的度数;
(3)问题解决
将图1中的菱形AEFG绕点A逆时针旋转60°得到图3,连接BE,CF,当
,
时,求CF的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48e6d4e45e1b0863f4f8e4f8e7593858.png)
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893449871458304/2951581459341312/STEM/5b0a978bd8164d93b0161d80b99dc487.png?resizew=498)
(1)问题引入
如图1,点E、G分别为边AB、AD上两点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d7f21876f1112f7a64388f7719eb488.png)
①BE、CF之间的数量关系为__________
②延长CF、BE交于点O,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6627bf98528ffa7a1919c3260b8ea9fd.png)
(2)拓展探究
将图1中的菱形AEFG绕点A顺时针旋转
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f48350f1dd23529438580ca41569804.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0e1e2a60c37ebc303d4fc2bf3d6a234.png)
(3)问题解决
将图1中的菱形AEFG绕点A逆时针旋转60°得到图3,连接BE,CF,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070bc896d35495237fd65576e9b6f88e.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】将一矩形纸片
放在直角坐标系中,
为原点,
在
轴上,
,
.
(1)如图①,在
上取一点
,将
沿
折叠,使点
落在
边上的
点,求
点的坐标;
(2)+如图②,在
、
边上选取适当的点
、
,将
沿
折叠,使
点落在
边上
点,过
作
交
于
点,交
于
点,设
的坐标为
,求
与
之间的函数关系式,并直接写出自变量
的取值范围;
(3)在(2)的条件下,若
,求
的面积.(直接写出结果即可)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/434845564fd5765244f8d1aa9240fa39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59a03c24198801bb06e249c50d7a5155.png)
(1)如图①,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca65d445e744cc4993a7f211561aa60e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/8/4558de8b-ca12-45db-b2bc-315d01c1650c.png?resizew=224)
(2)+如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b1a5427d8ff23df0f3ec194756c84c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ca6bcf95c2de27f10f1d52a1c03f29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f574463a3c3541e3e42cf7e1fee8e13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/700435c0e0ab3c1e80efec64bbea829c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f574463a3c3541e3e42cf7e1fee8e13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0203b006524305c3d8ee0b6c34cd872b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/8/cc903a55-9114-4e60-b380-e3fc8d726fd2.png?resizew=254)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8416b9c7e23d5f090b08c1adaadffc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52fdf64f436d4b7c6279eed09240df62.png)
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解答题-问答题
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较难
(0.4)
名校
【推荐2】如图,在矩形纸片ABCD中,已知
=
,将矩形沿EF对折(点E、F分别在边BC、AD上),使顶点D落在AB边上的点P处.
![](https://img.xkw.com/dksih/QBM/2022/3/17/2938202169688064/2938898267062272/STEM/0c5b331f-bc9c-415a-8836-f38c7ed03eba.png?resizew=198)
(1)若AB=4,BC=6,
①当AP=3时,求DF的长;
②设AP=m,EQ=y,试求y与m之间函数表达式;
(2)记四边形PQEF的面积为S,若
=k,试说明当k为何值时S的值最小?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2465ee1fec12351943f15055dfd6ec73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://img.xkw.com/dksih/QBM/2022/3/17/2938202169688064/2938898267062272/STEM/0c5b331f-bc9c-415a-8836-f38c7ed03eba.png?resizew=198)
(1)若AB=4,BC=6,
①当AP=3时,求DF的长;
②设AP=m,EQ=y,试求y与m之间函数表达式;
(2)记四边形PQEF的面积为S,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ab40260ac9056153d14d70d2519371.png)
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解答题-证明题
|
较难
(0.4)
【推荐1】如图,△ABC中,AC=BC,点I是△ABC的内心,点O在边BC上,以点O为圆心,OB长为半径的圆恰好经过点I,连接CI,BI.
![](https://img.xkw.com/dksih/QBM/2022/3/19/2939588012843008/2963867212865536/STEM/c268314ba9fd4526b0aa2a6c19c1fcd6.png?resizew=205)
(1)求证:CI是⊙O的切线;
(2)若AC=BC=5,AB=6,求sin∠ABI值.
![](https://img.xkw.com/dksih/QBM/2022/3/19/2939588012843008/2963867212865536/STEM/c268314ba9fd4526b0aa2a6c19c1fcd6.png?resizew=205)
(1)求证:CI是⊙O的切线;
(2)若AC=BC=5,AB=6,求sin∠ABI值.
您最近一年使用:0次
解答题-证明题
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较难
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【推荐2】如图,在
中,
,
,
是线段
上的一点,连接
,过点
作
,分别交
,
于点
,
,与过点A且垂直于
的直线相交于点
,连接![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/8246aeca-055a-4153-ac5f-7fa116fa38ff.png?resizew=147)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b02791d9414f0d87cce7205578e6ca0.png)
(2)若
是
的中点,求
的值.
(3)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54772dd379d3c6c1a1c4f0f00690ced6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/8246aeca-055a-4153-ac5f-7fa116fa38ff.png?resizew=147)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b02791d9414f0d87cce7205578e6ca0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3f7c1fd715395858fef59913b8d9262.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f37b9de09f3b48f1c6cd3f373e41dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dba7fb5fc911a992acf2ca0bb9c30bd5.png)
您最近一年使用:0次