名校
解题方法
1 . 如图,
中,
,
,
的面积为15,点
在边
上,
.点
是边
上的动点,连接
,点
与点
关于
轴对称,连接
、
、
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/7d0c23cd-cb65-4a5c-8c21-953bcabf8b97.png?resizew=175)
(1)点
到边
的距离为______.
(2)当点
、
、
共线时,求
的面积.
(3)当
为锐角三角形时,求线段
长的取值范围.
(4)当直线
将线段
分成
两部分时,直接写出线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af32ecdc0dc2f1a60b47f3311a0587d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc39144b305c67d44410d41053a1d28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b10100be43f77a13fa0ccd1c1d72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018af6682b038cfdf6ed136943413271.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1021bfa60d3603f970fa0a6726463f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17288da70b31823293794cb289e3123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcb94fabaf45726a6cfb11e77ca695a6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/7d0c23cd-cb65-4a5c-8c21-953bcabf8b97.png?resizew=175)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b10100be43f77a13fa0ccd1c1d72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ba4b6fff690633b4ec477750f57d4d1.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c23fc0f4da58f85891f38b4107c755c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
(4)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17288da70b31823293794cb289e3123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d65e051e943ab28fa57aee2fb57994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
您最近一年使用:0次
2 . 如图,正方形
的边长为5,点E是边
上的一点.
![](https://img.xkw.com/dksih/QBM/2022/11/13/3108892172386304/3110615627612160/STEM/554657c9f4ac4e3c80ec471881efba3e.png?resizew=142)
(1)当
时,求点B到直线
的距离;
(2)将正方形
沿直线
翻折后,点D的对应点是点
,连接
交正方形
的一边于点F,如果
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2022/11/13/3108892172386304/3110615627612160/STEM/554657c9f4ac4e3c80ec471881efba3e.png?resizew=142)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(2)将正方形
![](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/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ba89e83329983cfadbfcdda151aaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c581dab991aeadf06d972e47673ea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
您最近一年使用:0次
2022-11-16更新
|
193次组卷
|
3卷引用:上海市部分学校2022-2023学年九年级上学期期中数学试卷
上海市部分学校2022-2023学年九年级上学期期中数学试卷上海市徐汇区位育初级中学2022-2023学年九年级上学期期中考试数学试卷(已下线)第02讲 三角形一边的平行线(一)-【暑假自学课】2023年新九年级数学暑假精品课(沪教版,上海专用)
名校
3 . 已知,在等边
中,点
是直线
上任意一点,点
在直线
上,连接
、
,使得
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/a1825e49-a2af-481a-8f3e-2b0c077612c6.png?resizew=604)
(1)如图1,当点
在
的延长线上,求证:
;
(2)如图2,当点
在
上时,请画出图形,并直接写出结论
______
.(填“
”、“
”或“
”)
(3)在(2)的条件下,取
的中点
,连接
,过点
作
的垂线,垂足为
,若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bc0b0252b43f8cdf5fe53b47564ccc5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/a1825e49-a2af-481a-8f3e-2b0c077612c6.png?resizew=604)
(1)如图1,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4c78f25f9fb6ef82cb238f2807ae782.png)
(2)如图2,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392cdb9d30684cce244bef94b8d861b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
(3)在(2)的条件下,取
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe6adfced41b6d345910775e2223df6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
您最近一年使用:0次
4 .
、
分别与圆
相切于
、
,且
,
为直径,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/6/06676536-de34-4845-b5e9-6510b7494404.png?resizew=342)
(1)如图1,证明:
为圆
切线;
(2)如图2,若
切圆
于
,
与
交于
点,且
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19aa1197f8833c74a366237d55ce343c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/6/06676536-de34-4845-b5e9-6510b7494404.png?resizew=342)
(1)如图1,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1316c6cc2c467a695590706cf37b7857.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fabb971364ee25f2564a21e6133c9f2c.png)
您最近一年使用:0次
5 . 如图,在四边形ABCD中,AD//BC,∠BAD=90°,BD平分∠ADC.P,F,E分别是AD,DC,BC上的点,当点P从A运动到D时,点F恰好从D运动到C,4PD=BE.连接PE交BD于点G,已知
,BC=5,设PD=x,DF=y.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/f495aa88-b04a-447d-9769-5bad078ce6d9.png?resizew=226)
(1)求y关于x的函数关系式.
(2)当△FGE其中一边与△BCD某边平行时,求AP的长.
(3)若
是点F关于直线GD的对称点,当射线FG经过点
时,求△GEF的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d0ab4b0af66edb472b31763320e7e3f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/f495aa88-b04a-447d-9769-5bad078ce6d9.png?resizew=226)
(1)求y关于x的函数关系式.
(2)当△FGE其中一边与△BCD某边平行时,求AP的长.
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e55590555905eb4f57889bbd16e39a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e55590555905eb4f57889bbd16e39a.png)
您最近一年使用:0次
名校
6 . 综合与实践
如图,已知正方形OCDE中,顶点
,抛物线
经过点C、点D,与x轴交于A、B两点(点B在点A的右侧),直线
交x轴于点F.
![](https://img.xkw.com/dksih/QBM/2022/5/24/2986464594894848/2990523190829056/STEM/d0c83f22-91ef-48b0-bc7d-27fb94e98673.png?resizew=440)
(1)求抛物线的解析式,且直接写出点A、点B的坐标;
(2)若点G是抛物线的对称轴上一动点,且使
最小,则G点坐标为:______;
(3)在直线
(第一象限部分)上找一点P,使得以点P、点B、点F为顶点的三角形与
全等,请你直接写出点P的坐标;
(4)点M是射线AC上一点,点N为平面上一点,是否存在这样的点M,使得以点O、点A、点M、点N为顶点的四边形为菱形?若存在,请你直接写出点N的坐标;若不存在,请说明理由.
如图,已知正方形OCDE中,顶点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33a62c9695f5a1691c5fe8724fa764b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c468dc5cc34c14a188493a21019e8f83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0c03f0156764e6358d83697ea14c5ed.png)
![](https://img.xkw.com/dksih/QBM/2022/5/24/2986464594894848/2990523190829056/STEM/d0c83f22-91ef-48b0-bc7d-27fb94e98673.png?resizew=440)
(1)求抛物线的解析式,且直接写出点A、点B的坐标;
(2)若点G是抛物线的对称轴上一动点,且使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e21a8039a5ed0803caf60838d12c581c.png)
(3)在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6f7b16d65f1b2b8bea8cf4a83fde925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcc52a06d806fde891e09a0a389fcd4.png)
(4)点M是射线AC上一点,点N为平面上一点,是否存在这样的点M,使得以点O、点A、点M、点N为顶点的四边形为菱形?若存在,请你直接写出点N的坐标;若不存在,请说明理由.
您最近一年使用:0次
2022-05-30更新
|
608次组卷
|
4卷引用:2022年黑龙江省齐齐哈尔市建华区九年级中考二模数学试题
7 . 如图,等腰△ABC内接于⊙O,AB=AC,连结OC,过点B作AC的垂线,交⊙O于点D,交OC于点M,交AC于点E,连结AD.
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897210449666048/2979481404850176/STEM/68741930-57aa-45f6-8c3b-01f4029ba8bd.png?resizew=343)
(1)若∠D=α,请用含α的代数式表示∠OCA;
(2)如图1.
①求证:CE2=EM•EB;
②若BM=3,DM=2,求tan∠BAC的值.
(3)如图2,连结CD,若
,求y关于x的函数表达式.
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897210449666048/2979481404850176/STEM/68741930-57aa-45f6-8c3b-01f4029ba8bd.png?resizew=343)
(1)若∠D=α,请用含α的代数式表示∠OCA;
(2)如图1.
①求证:CE2=EM•EB;
②若BM=3,DM=2,求tan∠BAC的值.
(3)如图2,连结CD,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf416a0cad3d6296181a9e8c3f8ca38c.png)
您最近一年使用:0次
名校
8 . 如图,将正方形
对折后展开,得折痕
,连接
.点
在边
上,连接
,将
沿
折叠,当点
的对应点
落在
的边上时,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39e210795a966bd5dc1293479ab1988b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbe9b60364e489347f264cc3d8c30e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8812a841cd30f827beabf12452bbf8d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/128a67b9-b4ab-433b-9b79-9b32d8c7d7f2.png?resizew=126)
您最近一年使用:0次
2022-05-05更新
|
437次组卷
|
4卷引用:2022年河南省平顶山市九年级下学期中考二模数学试题
名校
9 . 在平面直角坐标系中,点O为坐标原点,点A、C分别在x轴、y轴正半轴上,四边形OABC是正方形,抛物线
经过点B、C,OA=18.
![](https://img.xkw.com/dksih/QBM/2022/3/4/2928927449464832/2931322990878720/STEM/c816d4d6-a252-46ec-92c3-339ecdcd531b.png?resizew=215)
![](https://img.xkw.com/dksih/QBM/2022/3/4/2928927449464832/2931322990878720/STEM/39003619-dc05-4660-a154-eb6db8d16c84.png?resizew=215)
![](https://img.xkw.com/dksih/QBM/2022/3/4/2928927449464832/2931322990878720/STEM/7988be0f-b4af-491c-b8da-71841a4b4ab0.png?resizew=215)
(1)如图1,求抛物线的解析式;
(2)如图2,点D是OA的中点,经过点D的直线交AB于点E、交y轴于点F,连接BD,若∠EDA=2∠ABD,求直线DE的解析式;
(3)如图3,在(2)的条件下,点G在OD上,连接GC、GE,点P在AB右侧的抛物线上,点Q为BP中点,连接DQ,过点B作BH⊥BP,交直线DP于点H,连接CH、GH,若GC=GE,DQ=PQ,求△CGH的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/488ffdeacafd0e1265c59ec08ca669f8.png)
![](https://img.xkw.com/dksih/QBM/2022/3/4/2928927449464832/2931322990878720/STEM/c816d4d6-a252-46ec-92c3-339ecdcd531b.png?resizew=215)
![](https://img.xkw.com/dksih/QBM/2022/3/4/2928927449464832/2931322990878720/STEM/39003619-dc05-4660-a154-eb6db8d16c84.png?resizew=215)
![](https://img.xkw.com/dksih/QBM/2022/3/4/2928927449464832/2931322990878720/STEM/7988be0f-b4af-491c-b8da-71841a4b4ab0.png?resizew=215)
(1)如图1,求抛物线的解析式;
(2)如图2,点D是OA的中点,经过点D的直线交AB于点E、交y轴于点F,连接BD,若∠EDA=2∠ABD,求直线DE的解析式;
(3)如图3,在(2)的条件下,点G在OD上,连接GC、GE,点P在AB右侧的抛物线上,点Q为BP中点,连接DQ,过点B作BH⊥BP,交直线DP于点H,连接CH、GH,若GC=GE,DQ=PQ,求△CGH的周长.
您最近一年使用:0次
2022-03-07更新
|
211次组卷
|
2卷引用:黑龙江省哈尔滨市风华中学2021-2022学年九年级下学期开学考试数学试卷
10 . 【问题情境】
如图①,小区
、
位于一条笔直的道路
的同侧,为了方便
,
两个小区居民投放垃圾,现在
上建一个垃圾分类站
,使得
与
,
的距离之比为
.
![](https://img.xkw.com/dksih/QBM/2021/6/1/2733872315523072/2738582910222336/STEM/952783e1-b746-4fba-8dde-cfb17a4c44d8.png?resizew=177)
【初步研究】
(1)在线段
上作出点
,使
.
如图,做法如下:
![](https://img.xkw.com/dksih/QBM/2021/6/1/2733872315523072/2738582910222336/STEM/d094de3e-26da-4c30-a3c3-6316057595d0.png?resizew=178)
第一步:过点
作射线
,
以
为圆心,任意长为半径画弧,交
于点
;
以
为圆心,
长为半径画弧,交
于点
;
以
为圆心,
长为半径画弧,交
于点
.
第二步:连接
,作
,交
于点
.
则点
即为所求.
请证明所作的点
满足
.
【深入思考】
(2)如图,点
在线段
上,点
在直线
外,且
.
求证:
是
的平分线.
![](https://img.xkw.com/dksih/QBM/2021/6/1/2733872315523072/2738582910222336/STEM/38c6bcc7-86b2-4b53-a014-c23531709037.png?resizew=145)
【问题解决】
(3)如图,已知点
,
和直线
,点
在线段
上,且
.用直尺和圆规完成下列作图.(保留作图痕迹,不写作法)
(ⅰ)在直线
上作出点
(异于点
),使
;
(ⅱ)在直线
上作出点
,使
.
如图①,小区
![](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/0f85fca60a11e1af2bf50138d0e3fe62.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/bbe103f073845122c66f22dcb14b711f.png)
![](https://img.xkw.com/dksih/QBM/2021/6/1/2733872315523072/2738582910222336/STEM/952783e1-b746-4fba-8dde-cfb17a4c44d8.png?resizew=177)
【初步研究】
(1)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beecce9f08bd51e57151c118d47adbbb.png)
如图,做法如下:
![](https://img.xkw.com/dksih/QBM/2021/6/1/2733872315523072/2738582910222336/STEM/d094de3e-26da-4c30-a3c3-6316057595d0.png?resizew=178)
第一步:过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aba947934b05caae8b0c1fb1a522a0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aba947934b05caae8b0c1fb1a522a0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
第二步:连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a01a93934db9637eeee23bac1c41c58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62112210f2486df84f4fb1ca940ee685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
则点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
请证明所作的点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beecce9f08bd51e57151c118d47adbbb.png)
【深入思考】
(2)如图,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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/431735568d4185104c6db1112ff03e10.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868ff1350bd72625328c85c3097cd85e.png)
![](https://img.xkw.com/dksih/QBM/2021/6/1/2733872315523072/2738582910222336/STEM/38c6bcc7-86b2-4b53-a014-c23531709037.png?resizew=145)
【问题解决】
(3)如图,已知点
![](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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](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/beecce9f08bd51e57151c118d47adbbb.png)
(ⅰ)在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef7544d17b055d3dc2ac1a8c3fbe4636.png)
(ⅱ)在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aecc96ed30daa1b342c56186065c00d.png)
![](https://img.xkw.com/dksih/QBM/2021/6/1/2733872315523072/2738582910222336/STEM/0362202a-2b93-44b4-9d61-06aaa2ceabd5.png?resizew=295)
您最近一年使用:0次