如图,已知有四个点A、B、C、D,根据下列语句画图:
(1)画直线AB,射线AC;
(2)连接DC,并将其反向延长至E,使DE=2DC;
(3)画∠ADB;
(4)点F既在AC上又在BD上,找到点F.
(1)画直线AB,射线AC;
(2)连接DC,并将其反向延长至E,使DE=2DC;
(3)画∠ADB;
(4)点F既在AC上又在BD上,找到点F.
![](https://img.xkw.com/dksih/QBM/2019/3/23/2166638574370816/2166930740084737/STEM/5960c1eedb8e4a2ea4613d5cd936b583.png?resizew=158)
更新时间:2019-03-23 22:54:47
|
相似题推荐
解答题-作图题
|
较易
(0.85)
名校
【推荐1】如图,已知P、A、B三点,按下列要求完成画图和解答.
(1)作射线
;
(2)连接
、
,用量角器测量
_________
.
(3)请用无刻度的直尺和圆规作图(保留作图痕迹):反向延长
至点C,使得
,连接
;
(4)过点P作
的垂线,垂足为点D;
(5)根据图形回答:在线段
、
、
、
中,最短的是线段________的长度,理由:_________.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/22/9ba61337-21ce-486f-b83f-285848409005.png?resizew=206)
(1)作射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a84b7de4bcbaa36f542b7ac3886bba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(3)请用无刻度的直尺和圆规作图(保留作图痕迹):反向延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1be86349e06431647f8e359d9bd07700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(4)过点P作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(5)根据图形回答:在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
您最近一年使用:0次
解答题-作图题
|
较易
(0.85)
名校
【推荐2】如图,
中,
.求作一点D,使得以A、B、C、D为顶点的四边形是菱形.(要求:尺规作图,保留作图痕迹,不写作法)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/10/99829011-6de1-4bc5-9645-5aedfc29d843.png?resizew=115)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐3】已知:线段
及射线
.
求作:等腰
,使得点C在射线
上.
作法一:如图1,以点B为圆心,
长为半径作弧,交射线
于点C(不与点A重合),连接
.
作法二:如图2.
①在
上取一点D,以点A为圆心,
长为半径作弧,交射线
于点E,连接
;
②以点B为圆心,
长为半径作弧,交线段
于点F;
③以点F为圆心,
长为半径作弧,交前弧于点G;
④作射线
交射线
于点C.
作法三:如图3,
①分别以点A,B为圆心,大于
的同样长为半径作弧,两弧分别交于点P,Q;
②作直线
,交射线
于点C,连接
.根据以上三种作法,填空:
由作法一可知:______
,
∴
是等腰三角形.
由作法二可知:
______
,
∴
(__________________)(填推理依据).
∴
是等腰三角形.
由作法三可知;
是线段
的______.
∴
(__________________)(填推理依据).
∴
是等腰三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
求作:等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/2/c612a971-16e7-48e2-a2af-43369245f712.png?resizew=432)
作法一:如图1,以点B为圆心,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
作法二:如图2.
①在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
②以点B为圆心,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
③以点F为圆心,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
④作射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
作法三:如图3,
①分别以点A,B为圆心,大于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d49404351575703cfe8325d1352ec9.png)
②作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
由作法一可知:______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107ce4aed7057a8d048bbe34f7fec9f6.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
由作法二可知:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/665ffcdb7c57534dc184cc840471f2f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4547137c187f693249a50709c85b99.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d89ba4036a5d18ec4abed44d7fd8e89.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
由作法三可知;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d89ba4036a5d18ec4abed44d7fd8e89.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
解答题-作图题
|
较易
(0.85)
【推荐1】按要求作图:平面上有A,B,C三点,如图所示,画直线
,射线
,线段
,在射线
上取点D,使
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4dd6e7c88601b4c50b06f1238fdd95d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/7dec0436-79da-4a00-8ee9-a7fa1dfc7a55.png?resizew=140)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐2】如图,在方格纸中,点
是三个格点(网格线的交点叫做格点),按要求回答以下问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/9/79b0ca18-1dd8-44ba-8b97-cba5d471660a.png?resizew=201)
(1)画线段
.
(2)过点
画直线
的垂线,垂足为点
.
(3)线段
______线段
(填“>”或“<”),理由是______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/9/79b0ca18-1dd8-44ba-8b97-cba5d471660a.png?resizew=201)
(1)画线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)过点
![](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/8455657dde27aabe6adb7b188e031c11.png)
(3)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
您最近一年使用:0次