把长方形
沿
折叠后,
点恰与
边上的
重合,如图,已知
,
.
(1)求
的长.
(2)求
的面积.
![](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/8455657dde27aabe6adb7b188e031c11.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/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/27/7a485067-4c35-421b-9170-ef3ed4404554.png?resizew=143)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca2698f08d94afa1cd5b81444791f4c7.png)
更新时间:2023-11-07 10:13:30
|
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解答题-问答题
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适中
(0.65)
【推荐1】【知识生成】我们已经知道,通过计算几何图形的面积可以表示一些代数恒等式,例如图1可以得到
,基于此,请解答下列问题:
,
,求
的值;
(2)【类比应用】
①若
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______
②若
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(3)【知识迁移】两块全等的特制直角三角板(
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/375d440fa0c1da0617388f0fc270542c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c960fc862fd36db83082f5c50cd604b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f29d5f376c75c41ae6af0c8a8565449.png)
(2)【类比应用】
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de1593dd31023a885884831c6c96c356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb538fbdd128aaad7ed65b8f2a72be1.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4f81bb76a9bb39d2e2d50d5529a4a7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8fd7e97de181f999558415edab0971f.png)
(3)【知识迁移】两块全等的特制直角三角板(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3d3c378b1118d331d30b63fc587b270.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88c5025689144c57cf36d1851ebc026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ba0c78f007358ec09c9eef1c5217d64.png)
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解答题-作图题
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适中
(0.65)
【推荐2】如图,在平面直角坐标系中,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcce0d8777fbf2c7c6e900caa9c92d81.png)
(1)画出
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(2)直接写出
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(3)在
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的面积等于
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8748dc55e2f45bc37fc4d84d7310f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f68f688a0af020ed2aa105a1bcdb52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcce0d8777fbf2c7c6e900caa9c92d81.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/4/3d9290a9-9db3-48da-9602-6e4fef8e22c9.png?resizew=272)
(1)画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e672b312de3694aa99fb0dbdbfab8dc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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您最近一年使用:0次
解答题-问答题
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适中
(0.65)
【推荐1】在△ABC中,AC=3,BC=4,AB=5,D、E分别是边AB、边BC上的点,把△ABC沿着直线DE对折,顶点B的对应点是点
.
(1)如图1,如果点
和顶点A重合,求CE的长;
(2)如图2,如果点
落在AC的中点,求CE的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a3ffc6f19fb329990ee3421f605dad8.png)
(1)如图1,如果点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
(2)如图2,如果点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a3ffc6f19fb329990ee3421f605dad8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/12/902e7fb7-6d3e-487e-8e1c-0452e58f3db3.png?resizew=315)
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解答题-证明题
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适中
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【推荐2】如图,矩形ABCD中,AB=4;AD=3,将矩形ABCD沿对角线AC折叠,点B落在点E处,B交CD于点F.
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(2)求△FAC的面积.
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解答题-问答题
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【推荐1】将矩形纸片ABCD按如图方式折叠,使点D与点B重合,点C落到C′处,折痕为EF.若AD=9AB=6,求折痕EF的长.
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解答题-问答题
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【推荐2】将矩形纸片ABCD按如图所示的方式折叠,AE、EF为折痕,∠BAE=30°,AB=
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您最近一年使用:0次