如图
是
的角平分线,过点
分别作
、
的平行线,交
于点
,交
于点
.
(1)求证:四边形
是菱形.
(2)若
,
.求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/15/ebf7d11e-9586-4ae2-adcc-d1260699d724.png?resizew=208)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/015572e6a2862542050c335211b3d0f2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/518c01271fd11fa87af3e2ef4e66d169.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcf05aaa351239448a9ab0e048f76faf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/015572e6a2862542050c335211b3d0f2.png)
更新时间:2023-08-12 11:42:43
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】如图,在
中,
.
于D,
,E是斜边
的中点.
的度数;
(2)若
,求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e27786709d347ff2c9bb92d26c56ec54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80b1107f50f4fc687e2cc5a11fb4486e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
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【推荐2】如图,正方形ABCD边长为4,点E在边AB上(点E与点A、B不重合),过点A作AF⊥DE,垂足为G,AF与边BC相交于点F.
(2)若△DEF的面积为
,求AF的长;
(3)在(2)的条件下,取DE,AF的中点M,N,连接MN,求MN的长.
(2)若△DEF的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5294d690e81bbc5c4898c97c538953f0.png)
(3)在(2)的条件下,取DE,AF的中点M,N,连接MN,求MN的长.
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【推荐1】如图,
是
的角平分线,线段
的垂直平分线分别交
和
于点
、
,连接
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/250fc05c-a403-4b35-b0f5-e8487cac9584.png?resizew=193)
(1)求证:四边形
是菱形;
(2)若
,
,求
的长;
(3)
满足什么条件时,四边形
是正方形?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/250fc05c-a403-4b35-b0f5-e8487cac9584.png?resizew=193)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48a61d8bedef61745ee4fd89a8c0c119.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc5df62e8ac9c74a46462519b95479a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ee826937d2add7a93aaa1422f8b736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48a61d8bedef61745ee4fd89a8c0c119.png)
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【推荐2】如图1,在矩形
中,对角线
,
相交于点O,过点A,B分别作
,
的平行线,相交于点E.
是菱形;
(2)若四边形
的面积是24,
,求矩形
的周长;
(3)如图2,在(2)的条件下,点P是线段
上的一动点,连接
,作点B关于直线
的对称点Q,若点P从点B开始向右运动了6个单位,求点Q运动的轨迹的长.
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e20e9d6c7e003d1a312b722e5e7fd4c5.png)
(2)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e20e9d6c7e003d1a312b722e5e7fd4c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addb8e20db1fbb40f17dea52f951b907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)如图2,在(2)的条件下,点P是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
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【推荐1】在
中,
,
是
的中点,
是
的中点,过点
作
交
的延长线于点
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/9c62a6b5-9089-4884-8be3-050304f54519.png?resizew=220)
(1)求证:四边形
是菱形;
(2)若
,
,求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6095bae4840bfa80f2468f94b2002d7b.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/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/9c62a6b5-9089-4884-8be3-050304f54519.png?resizew=220)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a5a2949b3d520ed03d57126c7d4d8d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ba6f4177822927b5875b92cd5f2038.png)
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【推荐2】如图,已知菱形ABCD的对角线AC、BD相交于点O,延长AB至点E,使BE=AB,连接CE.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/2ae568ae-57e7-4c99-a6e6-0166be84e784.png?resizew=185)
(1)求证:四边形BECD是平行四边形;
(2)若∠E=60°,AC=
,求菱形ABCD的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/2ae568ae-57e7-4c99-a6e6-0166be84e784.png?resizew=185)
(1)求证:四边形BECD是平行四边形;
(2)若∠E=60°,AC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
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