如图,已知平面直角坐标系和线段a,b.请用尺规作图法,求作
,使∠ABC=45°,AB=a,BC=b.(不写作法,保留作图痕迹)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/9/07552b87-47ed-4c4f-a6d0-888bc49376a9.png?resizew=378)
更新时间:2022-10-08 16:33:52
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解答题-作图题
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【推荐1】已知:线段a,b
求作:线段AB,使AB=2a+b(用直尺、圆规作图,不写作法,但要保留作图痕迹)
求作:线段AB,使AB=2a+b(用直尺、圆规作图,不写作法,但要保留作图痕迹)
![](https://img.xkw.com/dksih/QBM/2018/3/26/1910363419099136/1916276187144192/STEM/ff835c33c85f40118f0805f4a5ee46f0.png?resizew=89)
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解答题-问答题
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【推荐2】如图,A,B,C三点在同一直线上,点D在
的延长线上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/ef1d9e8c-6a02-4602-8448-e6e7a3d6c742.png?resizew=250)
(1)请用圆规在图中确定D点的位置;
(2)比较线段的大小:
_____
(填“>”、“=”或“<”);
(3)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028507b0cf5c08d4205798ec4b6d312c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/ef1d9e8c-6a02-4602-8448-e6e7a3d6c742.png?resizew=250)
(1)请用圆规在图中确定D点的位置;
(2)比较线段的大小:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3cd9a58451ed7e30d4918c396dbac74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97874667cd3a411d7553adbd402cd0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
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解答题-作图题
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【推荐1】已知
,点
是
边上一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/11/5725b78f-d50d-47cf-bef7-e8c67e43e30a.png?resizew=142)
(1)利用尺规在
的右侧以点
为顶点作
,使
;(不写作法,保留作图痕迹)
(2)写出射线
与
的位置关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/11/5725b78f-d50d-47cf-bef7-e8c67e43e30a.png?resizew=142)
(1)利用尺规在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb8490cab76a1a6e5cb35de8535be9be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82ce285220c891aaf95f1909cb191ccb.png)
(2)写出射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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解答题-作图题
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【推荐2】我国古代数学家刘徽在《九章算术注》中给出了证明三角形面积公式的出入相补法,即把一个平面图形从一处移至他处,面积不变;如果把图形分割成几块,那么各部分面积之和等于原来图形的面积.小华想结合该方法探究是否能利用尺规作图作一平行四边形,使其面积等于已知三角形的面积,请你帮他完成下面作图题.
如图,已知
,用不带刻度的直尺和圆规作出一平行四边形使其面积等于
的面积.(按如下步骤作图,保留作图痕迹)
①分别以点
,
为圆心,大于
长为半径画弧,两弧分别交于点
,
,作直线
交边
于点
;
②以点
为圆心,小于
长为半径画弧,分别交边
,
于点
,
,以点
为圆心,
长为半径画弧,在点
上方交边
于点
,以点
为圆心,
长为半径画弧交前弧于点
,作直线
交边
于点
;
③以点
为圆心,
长为半径画弧,交直线
于点
,连接
,则四边形
为所求作的平行四边形.
如图,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
①分别以点
![](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/20d49404351575703cfe8325d1352ec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
②以点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40fe477aea662f3ae9b6d28f1e785147.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67716ac738ee2911a69bf4063110a5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b375a47aa4ec53f6a501c465803c501.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
③以点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97223e7c3ff2c78bdedae87a8ba66112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97223e7c3ff2c78bdedae87a8ba66112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97607f6947b43d1847bb9db1b1c59615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06466a2bfa3e6a9683145d4f3a0d3d06.png)
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解答题-作图题
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【推荐1】如图,在
中,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/84187ce8-5f6c-4d43-b00e-56fa97511126.png?resizew=171)
(1)在边
上求作一点D,使点D到
的距离相等.(尺规作图,不要求写作法,并保留作图痕迹)
(2)若
,
,
,求点D到
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/84187ce8-5f6c-4d43-b00e-56fa97511126.png?resizew=171)
(1)在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5dc62e10004e73908091338362917da.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55cd495dbd7296b0092fa3e1ef77477.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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解答题-作图题
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【推荐2】已知:如图
及两点M、N.求作:点P,使得
,且P点到
两边的距离相等.(保留作图痕迹,不写作法)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4acd79bb9fb06f7c806eb6e17e4b613.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/26/ca6f197c-8194-4be8-825e-c5b53deea803.png?resizew=160)
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