名校
解题方法
1 . 如图1,已知
和
均为等腰直角三角形,点D、E分别在线段
上,
.
绕点A逆时针旋转,连接
,
的延长线交
于点F.当
的延长线恰好经过点E时,点E与点F重合,此时,
①
的值为 ;
②
的度数为 度;
(2)类比探究:如图3,继续旋转
,点F与点E不重合时,上述结论是否仍然成立,请说明理由.
(3)拓展延伸:若
,
,当
所在的直线垂直于
时,请直接写出线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d54431bbb28ebd98db5c1dc6083a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e1bff74f3356bff74a51c48524bd13b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a03841966d8142fa4a4aed023e37931.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9af91834644b94e1b023b33e15a0644.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77282d5b97a60264cf15fb74b48e4b59.png)
(2)类比探究:如图3,继续旋转
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
(3)拓展延伸:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80e6292216592a5eba3293a85bbdb3e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/571508bc4c42f2a2b2b223f871a6b155.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
2023-04-15更新
|
529次组卷
|
13卷引用:江苏省 盐城市 东台市第五联盟2023-2024学九年级下学期第一次月考数学试题
江苏省 盐城市 东台市第五联盟2023-2024学九年级下学期第一次月考数学试题2021年山东省济南市天桥区九年级下学期中考一模数学试卷2021年河南省实验中学中考数学第四次模拟考试试题山东省济南汇才学校2021~2022 学年九年级上学期 数学期中试题山东省济南市天桥区2021一2022学年九年级上学期期中数学试题2023年山东省济南市平阴区中考一模数学试题(已下线)2023年山东省济南市中考二模数学试题变式题21-26题(已下线)2023年济南一模(几何综合)山东省济南市历下区济南燕山学校2023-2024学年九年级上学期10月月考数学试题2024年山东省青岛市九年级数学一模复习模拟试题2023年山东省济南市长清区第三初级中学中考三模数学试题2023年山东省济南市中考数学一模压轴题汇编试题2024年广东省茂名市茂南区祥和中学二模数学试题
真题
2 . 【问题情境 建构函数】
(1)如图1,在矩形
中,
是
的中点,
,垂足为
.设
,试用含
的代数式表示
.
(2)在上述表达式中,
与
成函数关系,其图像如图2所示.若
取任意实数,此时的函数图像是否具有对称性?若有,请说明理由,并在图2上补全函数图像.
(3)在“
取任意实数”的条件下,对上述函数继续探究,得出以下结论:①函数值
随
的增大而增大;②函数值
的取值范围是
;③存在一条直线与该函数图像有四个交点;④在图像上存在四点
,使得四边形
是平行四边形.其中正确的是__________.(写出所有正确结论的序号)
【抽象回归 拓展总结】
(4)若将(1)中的“
”改成“
”,此时
关于
的函数表达式是__________;一般地,当
取任意实数时,类比一次函数、反比例函数、二次函数的研究过程,探究此类函数的相关性质(直接写出3条即可).
(1)如图1,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f74c3b0f7dead2845b967c419404d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e97bd4e9a6cfde753bfbd6e36136c57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbe6fea5bc81509d46cf9e3c4d49f588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)在上述表达式中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)在“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4d4f4de104ad982e8dbcd395a19891.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4496fe22b40bc63581998e6b7ef6783.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
【抽象回归 拓展总结】
(4)若将(1)中的“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b246acb593f661622d106a5b4deb84d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a7f846ce54225b1590103a39669cf69.png)
您最近一年使用:0次
2023-06-17更新
|
2424次组卷
|
9卷引用:2023年江苏省连云港市中考数学真题
2023年江苏省连云港市中考数学真题(已下线)2023年江苏省连云港市中考数学真题变式题22-27题江苏省南京市2023-2024学年九年级下学期期中数学试题2024年江苏省南京市联合体中考数学一模试题(已下线)专题14 几何综合题(37题)-学易金卷:2023年中考数学真题分项汇编(全国通用)(已下线)专题14反比例函数与几何压轴问题(优选真题60道)-学易金卷:三年(2021-2023)中考数学真题分项汇编【全国通用】(已下线)专题32 函数与几何综合问题(共25题)-学易金卷:2023年中考数学真题分项汇编(全国通用)(已下线)专题6 类比思想(已下线)第5讲 探究题
3 . 探究式学习是新课程倡导的重要学习方式,某兴趣小组拟做以下探究.
在
中,
,D是
边上一点,且
(n为正整数),E是
边上的动点,过点D作
的垂线交直线
于点F.
(1)如图1,当
时,兴趣小组探究得出结论:
,请写出证明过程.
【深入探究】
(2)①如图2,当
,且点F在线段
上时,试探究线段
之间的数量关系,请写出结论并证明;
②请通过类比、归纳、猜想,探究出线段
之间数量关系的一般结论(直接写出结论,不必证明)
【拓展运用】
(3)如图3,连接
,设
的中点为M.若
,求点E从点A运动到点C的过程中,点M运动的路径长(用含n的代数式表示).
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2bcb64c11c2d58a2306194400f96ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825671c551cc4593793b40c43d46757a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36978e392c8df4668ed3f74641febbfe.png)
【深入探究】
(2)①如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2d3df37e73a8abea815f37dbb3fff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a8dacb1b4ec6b635d336fd98b23d17.png)
②请通过类比、归纳、猜想,探究出线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a8dacb1b4ec6b635d336fd98b23d17.png)
【拓展运用】
(3)如图3,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
您最近一年使用:0次
2023-06-14更新
|
3663次组卷
|
14卷引用:2024年江苏省南通市海门区东洲国际学校模拟预测数学试题
2024年江苏省南通市海门区东洲国际学校模拟预测数学试题(已下线)查补培优冲刺01 三角形与四边形综合压轴-【查漏补缺】2024年中考数学复习冲刺过关(江苏专用)2023年四川省成都市数学中考真题(已下线)专题14 几何综合题(37题)-学易金卷:2023年中考数学真题分项汇编(全国通用)(已下线)专题19 图形的相似(含位似)-学易金卷:2023年中考数学真题分项汇编(四川专用)(已下线)专题22 几何压轴题-学易金卷:2023年中考数学真题分项汇编(四川专用)(已下线)2023年四川省成都市中考数学真题变式题24-26题(已下线)XDRzkgssxzw9103(已下线)专题23 几何综合-学易金卷:三年(2021-2023)中考数学真题分项汇编(四川专用)27.2.2相似三角形的性质(已下线)专题6 类比思想2024年广东省广州市铁一中学中考一模数学试题(已下线)难点05 相似三角形综合(与三角形综合,与四边形综合)-2024年中考数学【热点·重点·难点】专练(四川成都专用)(已下线)专题10 三角形压轴题综合-2024年中考数学二轮热点题型归纳与变式演练(全国通用)
名校
4 . (1)观察猜想
如图1,在
中,
,点D是
的平分线上一动点,连接
,将线段
绕点D逆时针旋转
得到线段
,连接
.
①
的值是 _________ ;
②射线AD与直线CE相交所成的较小角的度数是 _________ .
(2)类比探究
如图2,在
中,
,点D是
的平分线上一动点,连接
,将线段
绕点D逆时针旋转
得到线段
,连接
.请写出
的值及射线
与直线
相交所成的较小角的度数,并就图2的情形说明理由.
(3)拓展延伸
在(2)的条件下,若
,请直接写出当
时,
_________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/c7706084-0259-4bc6-b4c9-5237cc8e9ee3.png?resizew=490)
如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f480c60b88b546cb15d3b5622e212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a7d04e9ebfd9a6c425313738e0695fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78bfe4774b0926da92fd63dbb8e3d4a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7435836899f6cd9fd01d84568b02239e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/984ec72f6892e4363dcafa453c513217.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5516b52e2c32417b3ccf507a75bf5033.png)
②射线AD与直线CE相交所成的较小角的度数是 _________ .
(2)类比探究
如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f480c60b88b546cb15d3b5622e212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0acc09a0fc58a59e493335a0f9221a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78bfe4774b0926da92fd63dbb8e3d4a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abad404eeb5f9f9e10fd054d13c49ef9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/984ec72f6892e4363dcafa453c513217.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5516b52e2c32417b3ccf507a75bf5033.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(3)拓展延伸
在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27e1cca4f2b49592cf9a8a8d050aba4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/603b00dd3b49483316dde2e3a0fafcf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a5ec49537381ab89d51937ea13a4316.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/c7706084-0259-4bc6-b4c9-5237cc8e9ee3.png?resizew=490)
您最近一年使用:0次
2022-10-23更新
|
223次组卷
|
2卷引用:江苏省苏州市苏州中学伟长实验部2022-2023学年九年级上学期10月月考数学试题
真题
名校
5 . (1)【探究发现】如图①所示,在正方形
中,
为
边上一点,将
沿
翻折到
处,延长
交
边于
点.求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b59bbee2de231210bcbf54712ef652.png)
中,
为
边上一点,且
将
沿
翻折到
处,延长
交
边于点
延长
交
边于点
且
求
的长.
中,
,
为
边上的三等分点,
将
沿
翻折得到
,直线
交
于点
求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/164a4df60a15587971e883cf557b5ce2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b59bbee2de231210bcbf54712ef652.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2861a245d5aa633ae1d2c7158194f4e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/164a4df60a15587971e883cf557b5ce2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27546408b3fc40aed7d7d66e35e5561.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e47e91cdad2fa2f170c8add31d90676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b533adf08987c7bffc4355c1c3b57f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377f5c10cf527c87ab06bff61384f7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32330dec3ca2963949057a26eb5cddaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca2698f08d94afa1cd5b81444791f4c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8fbc229c957487495bb8cda1d4cfd8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
您最近一年使用:0次
2022-07-13更新
|
4121次组卷
|
15卷引用:2024年江苏省淮安市盱眙县第一中学 中考数学模拟测试 (三)
2024年江苏省淮安市盱眙县第一中学 中考数学模拟测试 (三)2022年广东省深圳市中考数学真题(已下线)专题21 与三角形、四边形相关的压轴题-2022年中考数学真题分项汇编(全国通用)(第2期)(已下线)第30课 相似三角形(动态几何,坐标问题)-2022-2023学年九年级数学上册课后培优分级练(北师大版)广东省佛山市黄岐中学2022-2023学年九年级下学期核心素养模拟测试数学试卷2023学年广东省佛山市顺德区拔萃实验学校中考一模数学试卷(已下线)2023年佛山等市一模(几何综合1)湖南省永州市新田县云梯学校2023-2024学年九年级上学期月考数学试题23-相似三角形广东省深圳市翠园文锦中学2023-2024 学年九年级下学期月考数学试题(已下线)专题6 类比思想2023年广西壮族自治区玉林市容县一模数学模拟试题2024年广东省深圳市中考二模数学试题(已下线)专题10 三角形压轴题综合-2024年中考数学二轮热点题型归纳与变式演练(全国通用)2024年广东省深圳市龙城初级中学中考模拟数学试题
真题
名校
6 . 探究与实践
“善思”小组开展“探究四点共圆的条件”活动,得出结论:对角互补的四边形四个顶点共圆.该小组继续利用上述结论进行探究.
提出问题:
如图1,在线段
同侧有两点
,
,连接
,
,
,
,如果
,那么
,
,
,
四点在同一个圆上.
如图2,作经过点
,
,
的
,在劣弧
上取一点
(不与
,
重合),连接
,
则
(依据1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8826527c10e6d04009ca7f3313163d34.png)
点
,
,
,
四点在同一个圆上(对角互补的四边形四个顶点共圆)
点
,
在点
,
,
所确定的
上(依据2)
点
,
,
,
四点在同一个圆上
(1)反思归纳:上述探究过程中的“依据1”、“依据2”分别是指什么?
依据1:__________;依据2:__________.
(2)图3,在四边形
中,
,
,则
的度数为__________.
是等腰三角形,
,点
在
上(不与
的中点重合),连接
.作点
关于
的对称点
,连接
并延长交
的延长线于
,连接
,
.
,
,
,
四点共圆;
②若
,
的值是否会发生变化,若不变化,求出其值;若变化,请说明理由.
“善思”小组开展“探究四点共圆的条件”活动,得出结论:对角互补的四边形四个顶点共圆.该小组继续利用上述结论进行探究.
提出问题:
如图1,在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4fd85cff10e8f192cfe0b0a8b2f4996.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
如图2,作经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95c193e68966879232ca0c83281bfd32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba51168da9382b9e573fcc4a88b6268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8826527c10e6d04009ca7f3313163d34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(1)反思归纳:上述探究过程中的“依据1”、“依据2”分别是指什么?
依据1:__________;依据2:__________.
(2)图3,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8889aad264f6d356c3f8bebe7d92e1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c4c3c0a34dc21292fa32befd58d8f82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49e52911a1ce4e7aab20151eb49322cd.png)
您最近一年使用:0次
2022-06-30更新
|
1435次组卷
|
11卷引用:江苏省扬州市仪征市第三中学2022-2023学年九年级下学期第一次月考数学试题
江苏省扬州市仪征市第三中学2022-2023学年九年级下学期第一次月考数学试题2023年江苏省淮安市淮安区中考一模数学试题(已下线)重难点02“四点共圆”模型-【暑假自学课】2023年新九年级数学暑假精品课(苏科版)2022年贵州省遵义市中考数学真题(已下线)专题20 与圆相关的压轴题-2022年中考数学真题分项汇编(全国通用)(第2期)(已下线)重难点04与圆相关的位置关系(11种模型)-2022-2023学年九年级数学考试满分全攻略(人教版)(已下线)第一节 圆的性质及其证明与计算03综合测2023年山西省朔州市怀仁市中考一模数学试题(已下线)2023年贵州省中考数学真题变式题22-25题(已下线)24.4(培优课)辅助圆、隐圆(题型精讲精练)-【题型分类精粹】2023-2024学年九年级数学上学期期中期末复习讲练系列【考点闯关】(人教版)2024年广东省珠海市凤凰中学中考三模数学试题
7 . 一次数学综合实践活动课上,小慧发现并证明了关于三角形角平分线的一个结论.
已知AD是
的内角平分线.求证:
.
[初步探究]小慧的证明思路是:如图,过点C作
,交
的延长线于点E,……就可以运用所学知识予以证明.
请你沿着小慧提供的思路写出下面的证明过程;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/cbc42d77-f281-49a9-a153-7be2df54d5e9.png?resizew=134)
[类比研究]小慧类比上面的研究思路继续学习,如图,已知
是
的一个内角相邻的外角平分线,又会得到类似的一个什么结论呢?请你写出这个结论,并予以证明;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/d85966f8-7fa2-45b8-b2b1-650da4a00538.png?resizew=168)
[应用拓展]如图,在
中,
,D是边
上一点.连接
,将
沿
所在直线折叠,点C恰好落在边
上的
点处.若
,
,则
的长为____________.
已知AD是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02bad7fac070822f4c8b4f8b64bda72.png)
[初步探究]小慧的证明思路是:如图,过点C作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec5d3a183594be47dd6e386d2c9d725.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
请你沿着小慧提供的思路写出下面的证明过程;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/cbc42d77-f281-49a9-a153-7be2df54d5e9.png?resizew=134)
[类比研究]小慧类比上面的研究思路继续学习,如图,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/d85966f8-7fa2-45b8-b2b1-650da4a00538.png?resizew=168)
[应用拓展]如图,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8e9ec412ea0355e4e5cd06c60e5fee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](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/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/995fcbf9-4d86-420e-aaf0-d655ed621497.png?resizew=167)
您最近一年使用:0次
8 . (1)【问题呈现】
如图1,
和
都是等边三角形,连接
,
.易知
_________.
(2)【类比探究】
如图2,
和
都是等腰直角三角形,
.连接
,
.则
_________.
(3)【拓展提升】
如图3,
和
都是直角三角形,
,且
.连接
,
.
①求
的值;
②延长
交
于点
,交
于点
.求
的值.
如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d698ee39cd00a9b6384e0c4897a055a.png)
(2)【类比探究】
如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21c2425db34d83dbe44f3ee3d2c5439b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d698ee39cd00a9b6384e0c4897a055a.png)
(3)【拓展提升】
如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21c2425db34d83dbe44f3ee3d2c5439b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/822765a2749e69de3f630c456c554cc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9af91834644b94e1b023b33e15a0644.png)
②延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/008a13558fdf96dc45178a6e49a94399.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/4/d9ea8f34-0f91-4de5-9f24-1116c826416d.png?resizew=436)
您最近一年使用:0次
2023-01-17更新
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489次组卷
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6卷引用:2024年江苏省苏州市中考数学模拟试题
9 . 问题背景:已知∠EDF的顶点D在△ABC的边AB所在直线上(不与A,B重合),DE交AC所在直线于点M,DF交BC所在直线于点N,∠B=∠A=∠EDF.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/7/7bad1919-08d2-4a93-aabc-965d98dc6678.png?resizew=701)
(1)初步尝试:如图①,当△ABC是等边三角形,判断:△ADM △BND(填相似或全等);
(2)类比探究:如图②,当AC=BC时,上述结论是否还成立?请说明理由.
(3)延伸拓展:如图③,在(2)的条件下,当点D在BA的延长线上运动到点M与点C重合时,若S△ADM:S△BND=1:2,BN:BM=1:3,AD=1,则DN= .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/7/7bad1919-08d2-4a93-aabc-965d98dc6678.png?resizew=701)
(1)初步尝试:如图①,当△ABC是等边三角形,判断:△ADM △BND(填相似或全等);
(2)类比探究:如图②,当AC=BC时,上述结论是否还成立?请说明理由.
(3)延伸拓展:如图③,在(2)的条件下,当点D在BA的延长线上运动到点M与点C重合时,若S△ADM:S△BND=1:2,BN:BM=1:3,AD=1,则DN= .
您最近一年使用:0次
2022-08-05更新
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260次组卷
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4卷引用:江苏省淮安市涟水县2021-2022学年九年级上学期期末数学试题
江苏省淮安市涟水县2021-2022学年九年级上学期期末数学试题(已下线)专题04相似三角形的性质与判定(八大类型)-【好题汇编】备战2023-2024学年九年级数学上学期期末真题分类汇编(苏科版)湖北省襄阳市樊城区2020-2021学年九年级上学期期末数学试题(已下线)第30课 相似三角形(动态几何,坐标问题)-2022-2023学年九年级数学上册课后培优分级练(北师大版)
名校
10 . 【问题背景】为了保持室内空气的清新,某仓库的门动换气窗采用了以下设计:
如图1,窗子的形状是一个五边形,它可看作是由一个矩形
和一个
组成,该窗子关闭时可以完全密封,根据室内的温度和湿度也可以自动打开窗子上的通风口换气.通风口为
(阴影部分均不通风),点F为
的中点,
是可以沿窗户边框上下滑动且始终保持和
平行的伸缩横杆.
、
分别为am,bm,窗子的高度(窗子的最高点到边框
的距离)为cm.
【初步探究】
(1)若
(即点E到
的距离为4).
①
与
之间的距离为1m,求此时
的面积;
②
与
之间的距离为xm,试将通风口的面积
表示成关于x的函数;
③伸缩杆
移动到什么位置时,通风口面积最大,最大面积是多少?
【拓展提升】
(2)若金属杆
移动到高于
所在位置的某一处时通风口面积达到最大值.
①c需要满足的条件是 ,通风口的最大面积是
(用含a、b、c的代数式表示)
②用直尺和圆规在图3中作出通风口面积最大金属杆
所在的位置,(保留作图痕迹,不写作法)
如图1,窗子的形状是一个五边形,它可看作是由一个矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecfb02e157819a2bdd0f2790cbc825e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
【初步探究】
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6274340f4becbc40f2cb54099293df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecfb02e157819a2bdd0f2790cbc825e9.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65a20728e9a9e3018723f2a86f24f332.png)
③伸缩杆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
【拓展提升】
(2)若金属杆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
①c需要满足的条件是 ,通风口的最大面积是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c901bcdfa58f0c68ad0161b0bab269.png)
②用直尺和圆规在图3中作出通风口面积最大金属杆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
2023-03-13更新
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465次组卷
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4卷引用:2023年江苏省盐城市盐都区义丰初级中学下学期九年级数学第一次模拟试题