用圆规、直尺作图,不写作法,但要保留作图痕迹.
已知:矩形ABCD,
求作:菱形AECF,使点E,F分别在边BC,AD上.
已知:矩形ABCD,
求作:菱形AECF,使点E,F分别在边BC,AD上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/30/002b03a9-17cb-407a-ac9a-1746762959d2.png?resizew=150)
更新时间:2016-12-06 12:11:12
|
相似题推荐
解答题-作图题
|
适中
(0.65)
名校
【推荐1】已知四边形ABCD,AC是四边形ABCD的对角线,用无刻度的直尺和圆规完成下列作图.(保留作图痕迹,不写作法)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/4b835a67-ca34-4256-927d-42f7f1b274b6.png?resizew=394)
(1)如图①,在对角线AC上求作一点M,使BM=CM;
(2)如图②,AB=CD,在对角线AC上求作一点N,使△ABN和△CDN的面积相等.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/4b835a67-ca34-4256-927d-42f7f1b274b6.png?resizew=394)
(1)如图①,在对角线AC上求作一点M,使BM=CM;
(2)如图②,AB=CD,在对角线AC上求作一点N,使△ABN和△CDN的面积相等.
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】如图,点
在线段
上,
,
,
,
交
于点G.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/23/2f13aaba-b1e3-48ac-8f07-7be846b3f985.png?resizew=178)
(1)尺规作图:过点
作线段
的垂线交
于点
.(基本作图,保留作图痕迹,不写作法,不下结论)
(2)求证
.
证明:∵
,
∴ .
在
和
中,
,
∴
,
∴
, ,
∴
.
∴
,
∴
,
∴ .
∵ ,
∴
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef3222a962b0a3b9bb1f4574b41bd79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1120e471627069e78a6733af07687684.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d2530e7023b2345c651e8f53629ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/23/2f13aaba-b1e3-48ac-8f07-7be846b3f985.png?resizew=178)
(1)尺规作图:过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(2)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7531ea8fd8e77ff62db1bc16da8999d9.png)
证明:∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef3222a962b0a3b9bb1f4574b41bd79.png)
∴ .
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2657e02314469ad2b13d31dce41b4343.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d224f4e018e4194e6be04f0e21a8a9f3.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13c61e530dbeb952dc8e210ae1d9a5c5.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d206437241d548a0dcf7c1e6606480.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a98de0441f089a41bd554c4640635b20.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe0bed25a209446077f4061d91858a59.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417eda93a175b955ebbf44e1b4998a3a.png)
∴ .
∵ ,
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7531ea8fd8e77ff62db1bc16da8999d9.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐1】如图,将矩形
沿过点
的直线折叠,使点
恰好与其对角线
的中点
重合,折痕与边
交于点
.延长
交
于
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/e9184085-31b7-4132-805b-c04f10d02f2f.png?resizew=180)
(1)根据题意补全图形;
(2)求证:四边形
是菱形;
(3)若
,则
的长为________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90c780dac29ff8b7df5881d3b33abab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/2023/4/6/e9184085-31b7-4132-805b-c04f10d02f2f.png?resizew=180)
(1)根据题意补全图形;
(2)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910936ec9fb419d51ce2f5ea817f8401.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图,
,点E在边
上,
,连接
.
![](https://img.xkw.com/dksih/QBM/2022/4/20/2962134649036800/2964184763228160/STEM/a4ce23fd-9ecd-4685-9623-af80c2e1da08.png?resizew=236)
(1)求证:四边形
是菱形.
(2)已知点F为
中点,过点F作
交
于点G,
,
,请直接写出
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dcb2a7526c13511d1a8247cf6f16e27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3275b04cb57af1d26fe2562cc4daa445.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/2022/4/20/2962134649036800/2964184763228160/STEM/a4ce23fd-9ecd-4685-9623-af80c2e1da08.png?resizew=236)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c42bce098904b241986bb91c65ab33.png)
(2)已知点F为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5afd58cf78512bc596645d2d5a1643fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/171fa1dca48260d03d56bee6374aa751.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7f0bb4e52fe48e500d9451add2d546d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次