问题:如图1,在
中,
,
,D为BC边上一点(不与点B.C重合),将线段AD绕点A逆时针旋转
得到AE,连接EC.
(1)求证:
;
(2)探索:如图2,在
与
中,
,
,
,将
绕点A旋转,使点D落在BC边上,试探索线段
、
、
之间满足的数量关系,并证明你的结论;
(3)应用:如图3,在四边形ABCD中,
,若
,
,求AD的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/28/ff849528-bcad-4991-800a-0750a449e4b3.png?resizew=510)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52273305805769a438772342b53c289e.png)
(2)探索:如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d110261e49b946b3e859ad0a8ba48a09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26813466e2ee49a493881a4384fc8748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d37b9bfc0e291952dc2004277fc3cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abb3c143721938422cde08e0690fac88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fa12efe16e6c4ef0ec08a078ecbb5a2.png)
(3)应用:如图3,在四边形ABCD中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2894a6ff5b198184fffcaa1d03a33227.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454328a8e75953fdb0835ce80d9566e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
更新时间:2020-12-15 20:44:27
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】已知:在平面直角坐标系中,点A在y轴正半轴上,点B在x轴负半轴上,点C在x轴正半轴上,连接
和
,过点C作
,垂足为点D,若
,直线AC的解析式为
.
(1)如图1,求证:
是等边三角形;
(2)如图2,过点A作
的平行线,过点C作
的平行线,两条平行线交于点E,点F是
中点,连接
和
,
与
相交于点Q,请直接写出
是______三角形;
(3)如图3,在(2)的条件下,在
的延长线上取一点K,连接
,点L是
上一点,连接
和
,使
,点P是
的中点,连接
并延长交
于点M,在
上取一点N,使
,连接
,若
,
,求点Q的坐标.
![](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/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b07d96dc07e1b07c29884ecf82e3385.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55902413548435010e14d98705ba028.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/31/d90d5f14-4164-409c-9717-c953d2ba99a3.png?resizew=571)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)如图2,过点A作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecff6005f926665a926c07ad62e0f032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecff6005f926665a926c07ad62e0f032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d01b9de38c02e28c475bf639727b59e6.png)
(3)如图3,在(2)的条件下,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e4c6b0869d7248b6c2f964718a67702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ee5a569f34f753ca561978c8eac49c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e97b71f8f462104b9157edc233b227e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15d166e891d41a1e48903ddddefd613f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e97b71f8f462104b9157edc233b227e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5161dac60a307b5768018875063deaac.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/2934239d4275870e77994feb6af6594e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/455d9a05141f0e9afa4fca657d0292aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf5578cce3ec4083cb07f925cbadfdd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48476a5f19bc75bf97e8fcb9e6f8c739.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐2】已知,在
中,过点
作
于点
,若
,
.
(1)如图
,求证:
为等边三角形;
(2)如图
,点
在
的延长线上,点
在
上,连接
、
,若
,求证:
;
(3)如图
,在(
)的条件下,连接
,取
的中点
,连接
并延长交
于点
,若
,
的面积为
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b07d96dc07e1b07c29884ecf82e3385.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/5/d3963782-647a-4de8-94a6-f7d54fd9a3ed.png?resizew=513)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39addc1173a458af87ed5c5e3f06466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e0ae50d5993a332b5cddb022eaa6f1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f60e36e7ac279135e93bf11d7b48b3ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee2acda6dbad2fd5cada1b339bc5227.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e0ae50d5993a332b5cddb022eaa6f1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dff96d337f35747d655c475a56e9a332.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c4750875c2116879747e9d35178db1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27567d43c5b91382ee3d7ca708ee422.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.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】在等腰
,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/97077309-1382-4370-954c-f40abdd19423.png?resizew=513)
(1)如图1,若点D是
中点,过点D作
于点E,
,连接
,求线段
的长度.
(2)如图2,R,T是斜边
上的三等分点,在
外部取一点H,使得
为等腰直角三角形,其中
,
,连接
,求证:
.
(3)如图3,在
内部有一动点M,满足
,将
沿
翻折至
,取
的中点N,P为线段
上的一动点,连接
,将
沿直线
翻折至
,在P、M运动的过程中,当
取得最小值时,且
,求
的值.(直接写出答案即可)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f49cefcd09bb472287e0ae3385c8dc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/97077309-1382-4370-954c-f40abdd19423.png?resizew=513)
(1)如图1,若点D是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a566b100fb2ebe3d208f9b6527934218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(2)如图2,R,T是斜边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e6ad90a1b73d74c385d44192131fb2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd180a245976aa969649ba972cb85079.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4c229c63bccfa91d51b71b3ab870484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d030bc03d5e8e2bbd79de338a7c375ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f6c39d741d349a515eb437e1841bf50.png)
(3)如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c062f4734f584d02acdc4081646c84f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004104bafb5f30338123d4ea2b7fedde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c91e7c2b2f2e6d11d8432b6ddb9848cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9840faf371904eecde229c69a6e7220f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fa88d04b31e308f29bc83bc09d4084d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a455a065d96df44df48da0179e83742.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐2】如图,
中,
,
是斜边
上的高,
,
,点
为边
上点(点
不与点
、
重合),连接
,作
,
与边
、线段
分别交于点
、
.
(1)求证:
;
(2)当
时,求
的值;
(3)连接
,当
与
相似时,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfb08f6a798dc293f3d8de281190f65e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7cc087c22e1fc1197236c71e5465d33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/23/cb7de3b0-d83e-4318-98fa-7b86d82bc18d.png?resizew=550)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b900563fb461a86c1d534de61a1256.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f21678a0009eb39b6886653d295b09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/269222723f4d65927e1ffdcd8ea25d63.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcaecf08a22124a457128fb04c9c02bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】问题背景:如图1,在正方形
中,点
、
分别在边
、
上,
,
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/25/cce9212c-4385-4b94-b93b-99138b3c2bee.png?resizew=491)
(1)求证:
;
(2)迁移应用:如图2,在正方形
中,
、
交
于点
、
,若
,
,
,求
的长.
(3)联系拓展:如图3,在矩形
中,点
、
分别在边
、
上,
,若
,探究
与
的数量关系,并给出证明.
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/25/cce9212c-4385-4b94-b93b-99138b3c2bee.png?resizew=491)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c9af98a1a048b1e2f7c71e83c33498c.png)
(2)迁移应用:如图2,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf25e032b5599ac49383de06e776365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf702adb116c1e46569eb7050d029f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a905adbbb180485b97a0f92534a1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e7a14fd683fa8a8d477338703241af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6acf4bf8e5ad8f3e9e7a312f65c1b9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
(3)联系拓展:如图3,在矩形
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/664a4e2248bb8fbd025b8d7facb439bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
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解答题-证明题
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较难
(0.4)
【推荐2】如图1,菱形ABCD中,DE⊥AB,垂足为E,DE=3cm,AE=4cm,把四边形BCDE沿DE所在直线折叠,使点B落在AE上的点M处,点C落在点N处,MN交AD于点F.
(1)证明:FA=FM;
(2)求四边形DEMF面积;
(3)如图2,点P从点D出发,沿D→N→F路径以每秒1cm的速度匀速运动,设运动时间为t秒,当t为何值时,△DPF的面积与四边形DEMF的面积相等.
(1)证明:FA=FM;
(2)求四边形DEMF面积;
(3)如图2,点P从点D出发,沿D→N→F路径以每秒1cm的速度匀速运动,设运动时间为t秒,当t为何值时,△DPF的面积与四边形DEMF的面积相等.
![](https://img.xkw.com/dksih/QBM/2019/5/22/2208988937879552/2212217448374272/STEM/dcb6aa2959fc47b3b476baa52510eaa7.png?resizew=396)
您最近一年使用:0次