如图,正方形
中,
,点
是对角线
上的一点,连接
,过点
作
,交
于点
,以
、
为邻边作矩形
,连接
.
是正方形;
(2)求
的值;
(3)若
恰为
的中点,连接
,求点
到
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3f58c56ea4208b11b56a343ea1de26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c17d5b76e2dbaaa6e295f0d5dad969b.png)
(3)若
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
更新时间:2023-07-26 11:32:02
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】在正方形
中,
、
分别是
、
上的点,且
,将线段
以
为旋转中心顺时针旋转90°,得到线段
.
(1)如图1所示,求证:
是等腰直角三角形;
(2)若
是
的中点,试判断线段
与线段
的关系.
![](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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe220a8c1ff10bb18014c70d3e06bbd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(1)如图1所示,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/178ef566563d3d778805a160cc2ec6a5.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://img.xkw.com/dksih/QBM/2021/6/30/2754059811078144/2818577396105216/STEM/174b58e7485e4fa0b5427e3abcce7e44.png?resizew=412)
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|
适中
(0.65)
【推荐2】已知:以线段AB为边在线段的同侧作△ABC与△BAD,BC与AD交于点E,若AC=BD,BC=AD.
(1)如图1,求证:CE=DE;
(2)如图2,当∠C=90°,∠AEB=2∠AEC时,作EF⊥AB于F,请直接写出所有等于
AB的线段.
(1)如图1,求证:CE=DE;
(2)如图2,当∠C=90°,∠AEB=2∠AEC时,作EF⊥AB于F,请直接写出所有等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/2021/12/21/2877125737496576/2881630555537408/STEM/159c3b41-a8e3-4d00-a0be-5a71f6fe7057.png?resizew=447)
您最近一年使用:0次
【推荐3】数学兴趣小组在活动时,老师提出了这样一个问题:如图1,在
中,
,
,D是BC的中点,求BC边上的中线AD的取值范围.
小明在组内经过合作交流,得到了如下的解决方法:延长AD到E,使
,请补充完整证明“
≌
”的推理过程.
求证:
≌![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929a9b1aa32b44492073d3a353a6bb36.png)
证明:
延长AD到点E,使![](https://staticzujuan.xkw.com/quesimg/Upload/formula/136822a312efd552ce3000b87ee63a19.png)
在
和
中
已作
,
______
,
中点定义
,
≌
______
,
探究得出AD的取值范围是______;
【感悟】解题时,条件中若出现“中点”“中线”等字样,可以考虑延长中线构造全等三角形,把分散的已知条件和所求证的结论集合到同一个三角形中.
【问题解决】
如图2,
中,
,
,AD是
的中线,
,
,且
,求AE的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882589c896c6993d9687f0e14a283481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c34417066b132522ff74a479d812e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b781b83014cba03ac8f6743d06e134.png)
小明在组内经过合作交流,得到了如下的解决方法:延长AD到E,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/136822a312efd552ce3000b87ee63a19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43597ab827d2c41c8be36df76acde179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929a9b1aa32b44492073d3a353a6bb36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43597ab827d2c41c8be36df76acde179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929a9b1aa32b44492073d3a353a6bb36.png)
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/136822a312efd552ce3000b87ee63a19.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43597ab827d2c41c8be36df76acde179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929a9b1aa32b44492073d3a353a6bb36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5810cf92cf4f393711f4c792b0bfe111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041b5c5cb8e3b17212cfa71f89dfb996.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91d2af2a9ba01938e20a42ab1c56849c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05efdc83eb5f9e71b8ae00d615746409.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/529e3096d26f12f8095beb9a7ab9063e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
【感悟】解题时,条件中若出现“中点”“中线”等字样,可以考虑延长中线构造全等三角形,把分散的已知条件和所求证的结论集合到同一个三角形中.
【问题解决】
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4bb89a362c1faf4d0c306eabbb59710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882589c896c6993d9687f0e14a283481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/809da6723d608809e6aba07e2f833964.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf435f85883d2db2430a5b7bf41dab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882589c896c6993d9687f0e14a283481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ec3555319e74b48c1dd60e7db2c9182.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e2522378e0839e58a61b18b0bc07bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98de738f92924a1121882624769b093e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/10/7739a8bd-2780-495c-bf4d-fb75adc29950.png?resizew=220)
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,在
中,
,
平分
交
于点D,作
于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/a41ee1d5-0e9b-4230-a552-926a2a73aa36.png?resizew=166)
(1)若
,求∠C的度数.
(2)若
,
.
①求
的长度;
②求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/a41ee1d5-0e9b-4230-a552-926a2a73aa36.png?resizew=166)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,在矩形
中,对角线
,
相交于点
,
,
分别是
,
的中点.连接
,若
,
,求矩形
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/1dde8112e8eb968fd042418dd632759e.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/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6747441b260ca043446b5d472fece440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce78ce83e9a109c61b759bc04cb507c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/14/fc73330f-3dde-4015-9323-0867bb349a19.png?resizew=171)
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
中,
,
是
边上的中线,以
为边作平行四边形
,连接
分别与
相交于点
.
满足什么条件时,四边形
为正方形,并说明理由.
(2)在(1)条件下,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c10d461a7c0b86a2f09c2ea17f38260e.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/d7e545f31f7cc57a31843f5adfd02941.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a5a2949b3d520ed03d57126c7d4d8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/073a4cce4d2ab0cf04d36e55c323fbe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af831ab4b136505ac37d71e97c542753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fcec93a2dea80a9c67a1802e78d112c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a5a2949b3d520ed03d57126c7d4d8d.png)
(2)在(1)条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,长方形纸片
,
,
.点
是
边上一点,将
沿
翻折得到
.
【问题解决】
(1)如图1,点
落在边
上的点
处,若
,求
和
的长;
【类比探究】
(2)如图2,当点
和点
重合时,点
落在边
上的点
处,折痕为
.判定四边形
的形状,并说明理由;
【拓展应用】
(3)如图3,当点
和点
重合时,点
落在长方形
内部的点
处,折痕为
,
平分
交
于点
,连接
.当
的长度最短时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de3a8deac36e5cdc2d67a0142b5326fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48059d66f8b5c9864e26bff71edfb844.png)
【问题解决】
(1)如图1,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7ea03277f8408fabe5b327cc34838f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87448e09eaa816e50ae92d111d5ded6.png)
【类比探究】
(2)如图2,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fca035e1a2bc3501a2bde2e861577e.png)
【拓展应用】
(3)如图3,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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