如图①,在矩形ABCD中,点P从AB边的中点E出发,沿着E﹣B﹣C匀速运动,速度为每秒1个单位长度,到达点C后停止运动,点Q是AD上的点,AQ=10,设△PAQ的面积为y,点P运动的时间为t秒,y与t的函数关系如图②所示.
(1)图①中AB= ,BC= ,图②中m= .
(2)点P在运动过程中,将矩形沿PQ所在直线折叠,则t为何值时,折叠后顶点A的对应点A′落在矩形的一边上.
(1)图①中AB= ,BC= ,图②中m= .
(2)点P在运动过程中,将矩形沿PQ所在直线折叠,则t为何值时,折叠后顶点A的对应点A′落在矩形的一边上.
![](https://img.xkw.com/dksih/QBM/2021/7/1/2754855595196416/2768344603926528/STEM/ddec5e35-bb24-46dc-9ba6-71ed181e2e07.png)
更新时间:2021-07-20 15:54:25
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【推荐1】如图,在平面直角坐标系中,直线y=
x+2与y轴、x轴分别交于点A,B,点M在线段AB上运动(不与点A,B重合),连接OM.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/29f9637f-12e4-43f0-bf41-fc0435da16fb.png?resizew=365)
(1)求线段OB的长;
(2)设点M的横坐标为m,△BOM的面积为S,求S关于m的函数关系式(不必写出自变量m的取值范围);
(3)若点M为线段AB的中点,点P为射线BO上的动点,将△APM沿直线PM折叠得到△A1PM,若以点A1、B、P、M为顶点的四边形是平行四边形,直接写出点A1的横坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cfa1e7ffae662aefb49a44c52d4954d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/29f9637f-12e4-43f0-bf41-fc0435da16fb.png?resizew=365)
(1)求线段OB的长;
(2)设点M的横坐标为m,△BOM的面积为S,求S关于m的函数关系式(不必写出自变量m的取值范围);
(3)若点M为线段AB的中点,点P为射线BO上的动点,将△APM沿直线PM折叠得到△A1PM,若以点A1、B、P、M为顶点的四边形是平行四边形,直接写出点A1的横坐标.
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【推荐2】如图1,已知直线
:
分别交
,
轴于
,
两点,点
在
轴负半轴上,且
.
(1)求直线
的解析式;
(2)如图2,点
是线段
上一点,若
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae652daf6059ff386f99bef2210518c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd3fd00798e7ec50afafe7fa7a4f42e.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38f32a953dfc4581d04222084f224f70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/5/46a14a41-c2e4-4a45-98a2-60d5564bf971.png?resizew=490)
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【推荐1】如图,在
中,
平分
,
于点
,点
是
的中点.
(1)如图1,
的延长线与
边相交于点
,求证:
;
(2)如图2,线段
、
、
之间满足的数量关系为_________;
【初步运用】
(3)如图3,
中,
平分
,
,垂足为
,过
作
交
于点
,
,
,则
_________;
【灵活运用】
(4)如图4,
中,
,
,点
在
上,
,
,垂足为E,
与
交于点
,线段
、
之间满足的数量关系为_________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f09785a454d62cbbd2e16ed61ed172a9.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(1)如图1,
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af07faebaf5346f6c3cd2603519d0f60.png)
(2)如图2,线段
![](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/49b50357a6545cae8348e3059312f520.png)
【初步运用】
(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/650c6c818df102a83ce5159e3208d01a.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/6c0aa4c793921fdaa5d430cb90d78ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f01c4faacedfe56f5127d6c0cc63cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404728d0ea2699c71e674f30dd984abd.png)
【灵活运用】
(4)如图4,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f81e24376a13d648c2ed0dc73bc710e.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbaec9cc53032210714b95af502c7dae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/878a63a7899c8226744748a0102eab95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.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/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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解题方法
【推荐2】如图,在平面直角坐标系中,O为坐标原点,
的边
在x轴上,A、B、C三点的坐标分别为
,
,
,且
,一动点P从点B出发,以每秒2个单位长度的速度沿射线
匀速运动,设点P运动时间为t秒.
![](https://img.xkw.com/dksih/QBM/2021/4/29/2710168850628608/2710494586454016/STEM/990ac02bf1224feb90744f1557c4fd1a.png?resizew=211)
![](https://img.xkw.com/dksih/QBM/2021/4/29/2710168850628608/2710494586454016/STEM/990ac02bf1224feb90744f1557c4fd1a.png?resizew=211)
(1)求A、C两点的坐标;
(2)若点P恰好在
的角平分线上,求此时t的值;
(3)当点P在线段
上运动时,在y轴上是否存在点Q,使
与
全等?若存在,请求出t的值并求出此时点Q的坐标:若不存在,请说明理由.
(4)连结
,若
为等腰三角形,请直接写出点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/739103e7904353fc339841f65b680c61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/617273f8dcc4cfd4e8f8e8524cbe9059.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2d8399b9adcd203a62b70d60d1a822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0355097c183273c3297e757897785383.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://img.xkw.com/dksih/QBM/2021/4/29/2710168850628608/2710494586454016/STEM/990ac02bf1224feb90744f1557c4fd1a.png?resizew=211)
![](https://img.xkw.com/dksih/QBM/2021/4/29/2710168850628608/2710494586454016/STEM/990ac02bf1224feb90744f1557c4fd1a.png?resizew=211)
(1)求A、C两点的坐标;
(2)若点P恰好在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a457b899731577bfe61dda594ae4eec4.png)
(3)当点P在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fdc02f00cf00a6dfd88b53a90f1f7a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
(4)连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
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【推荐1】(
)请根据教材提示,结合图
,写出完整的证明过程.
(
)初步探究:如图
,在四边形
中,
于点
,连接
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
的度数为 ;
求
长.
(
)拓展运用:如图
,在平行四边形
中,
是
边上一点,
.按以下步骤作图:
以点
为圆心,以适当的长为半径作弧,分别交
于点
;
分别以点
为圆心,大于
的长为半径作弧,两弧交于点
,作射线
.过点
作
交
于点
,过点
作
于点
,
为射线
上一动点,连接
,若
,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4736f933788257c05c3bc92be046862c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96c5e7ab5a46dd74168a6555fd6bf6b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/f801d0853a07516c18217e3852b45562.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4515e1dff9a852b3294dc1d6488a5748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f44755c5fee4b90266eac73ad47a128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f44755c5fee4b90266eac73ad47a128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94e1ca12da27075e5241b7c7ce74672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc4bd6a6cd117d2b7929e5f5ed5927b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73d7566369c178316219bb466a66d062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1215950c8fb20337880fc0f5e95dce3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22072cf9e5d4259f8f51e5c94490bf93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/013d609ef2ded6729da96280cc95fdac.png)
例:如图![]() ![]() ![]() ![]() ![]() 证明:延长 ![]() ![]() ![]() ![]() … |
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【推荐2】如图,平面直角坐标系中,已知点
在y轴正半轴上,点
,点
在x轴正半轴上,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ed7fe4fdd870f9dcc707dda949cf59b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/7/94c52b86-4b13-486a-8d7c-0a5767b264bd.png?resizew=562)
(1)如图1,求证:
;
(2)如图2,当
,
时,过点B的直线与
成
夹角,试求该直线与
交点的横坐标;
(3)如图3,当
时,点D在
的延长线上,且
,连接
,射线
交
于点E.当点B在y轴负半轴上运动时,
的度数是否为定值?如果是,请求出
的度数;如果不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/296c31eaede57efe89ffb83f02ad4622.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25368747077bd9cf69f2482005256669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6396a31ef91a7431d22dc3ce035ee9f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ed7fe4fdd870f9dcc707dda949cf59b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/7/94c52b86-4b13-486a-8d7c-0a5767b264bd.png?resizew=562)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dc6e07bcfb139649f49228accf44726.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89d500af0ca164f4f04b67a080ba6189.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcbafa9d06b887b6ade3efb9122760a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b342d5cb6dd1c84a82f6aca68ed829c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
(3)如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7992d077652ab674493d0836520fc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6967ebd791092c62b4ef97924d91883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d409bf4d5dd2b2d043668966f975beb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6c9c56e7fe6d14f52430cdf767205ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6c9c56e7fe6d14f52430cdf767205ae.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐1】“矩形的折叠”活动课上引导学生对矩形纸片进行折叠.
如图,将矩形纸片
折叠,点A与点D重合,点C与点B重合,将纸片展开,折痕为
,在
边上找一点P,沿
将
折叠,得到
,点D的对应点为点Q.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/4be5846c-5878-4692-8cea-426b959a130f.png?resizew=146)
(1)问题提出:若点Q落在
上,
,连接
.
①
是______ 三角形;
若
是等边三角形,则
的长为______ .
(2)深入探究:在(1)的条件下,当
时,判断
的形状并证明;
(3)拓展延伸;若
,
,其他条件不变,当点Q落在矩形
内部
包括边
时,连接
,直接写出
的取值范围.
如图,将矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba70863115b0947e98214a7b2512167d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/4be5846c-5878-4692-8cea-426b959a130f.png?resizew=146)
(1)问题提出:若点Q落在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec26d81361e13a37bcf3c95db0ee89b6.png)
若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec26d81361e13a37bcf3c95db0ee89b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)深入探究:在(1)的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9c3ec174b1ce835cc8737ff6ce57e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec26d81361e13a37bcf3c95db0ee89b6.png)
(3)拓展延伸;若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ee826937d2add7a93aaa1422f8b736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,矩形
中,
,
,
是边
上一点,将
沿直线
翻折,得到
.
平分
时,求
的长;
(2)连接
,当
时,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f9fba8a4098c1a0515286eb8d616dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246b32e19ae21b0cd1f826c47f517ca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df92344b00e2aa8e7f0d1fa997b9dd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58ef478c804c71ad3b374196a8ca9d74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f7ad41b36674fd6e90176ee24cdefbb.png)
您最近一年使用:0次