1 . 图1、图2、图3均是
的正方形网格.每个小正方形的顶点称为格点,点
、
、
、
均在格点上,点
在
上且不是格点.只用无刻度的直尺,分别在给定的网格中按下列要求作图,保留作图痕迹.
的中点
;
(2)在图②中,在线段
上确定一点
,连接
,使
;
(3)在图③中,在线段
上确定一点
,连接
,使
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(2)在图②中,在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e0a1e6f8a4b22e1ff9d3bccb4b1faaa.png)
(3)在图③中,在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3a6922808e9b59352c25c341cf23851.png)
您最近一年使用:0次
2 . 图①、图②、图③均是
的正方形网格,每个小正方形的边长为1,小正方形的顶点称为格点,
的顶点均在格点上.只用无刻度的直尺,在给定的网格中,按要求画出相应图形,保留作图痕迹.
(1)在网格①中的
边上找点
,在
边上找点
,连接
,使
.
(2)在网格②中的
边上找点
,连接
,使
.
(3)在网格③中的
边上找点
,连接
,使
的面积是
面积的4倍.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd4be97adde17423d59d86d18318c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/10/6c7a0d3a-89fb-4d23-a085-6a43a1e3f2d6.png?resizew=442)
(1)在网格①中的
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5545dc3211671941048034af38092fa6.png)
(2)在网格②中的
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9470706f29956eb2ed7e8b8c2d5f5f5.png)
(3)在网格③中的
![](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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
您最近一年使用:0次
3 . 如图,在4×4的正方形网格图中,点A、B均在格点上,请按要求完成下列解答:
(注:作图仅能使用无刻度的直尺,且要求保留作图痕迹.请你借助网格图完成第(2)、(3)、(4)小题的作图).
(2)在网格图中找一个格点C,连接BC,使BC⊥AB;
(3)在网格图中,用正确的方法画出线段AB的中点D;
(4)连接AC并在线段AC上找一点E,连接DE,使DE
BC.
(注:作图仅能使用无刻度的直尺,且要求保留作图痕迹.请你借助网格图完成第(2)、(3)、(4)小题的作图).
(2)在网格图中找一个格点C,连接BC,使BC⊥AB;
(3)在网格图中,用正确的方法画出线段AB的中点D;
(4)连接AC并在线段AC上找一点E,连接DE,使DE
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
您最近一年使用:0次
2022-09-09更新
|
143次组卷
|
3卷引用:数学(长春卷)-【试题猜想】2024年中考考前最后一卷
名校
4 . 图①、图②、图③都是
的网格, 每个小正方形的顶点为格点,
的顶点
、
、
均在格点上,在图①、图②、图③中,只用无刻度的直尺,在给定的网格中按要求作图,不要求写出画法.
(1)在图①中画出
边
上的中线AD, 则
.
(2)在图②中画出
,点
、
分别在边
、
上,满足
,且
;
(3)在图③中画出
,点
分别在边
、
上,使得
与
是位似图形,且点
为位似中心,位似比为
(保留作图痕迹)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd4be97adde17423d59d86d18318c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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)
(1)在图①中画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f78e8367db4f171d15a517a017dbef1.png)
(2)在图②中画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/233b8fa0cfd67ced2e9cb01d484b5a2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e8f8b5bddaafa3f87ce59c56759b80a.png)
(3)在图③中画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d0469336f71edd52dc9148c67db052.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d0469336f71edd52dc9148c67db052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3322a2ad9a95bdc9fc576a7a158d4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://img.xkw.com/dksih/QBM/2020/10/22/2576462383226880/2576558314586112/STEM/50dbb7d6-b651-4c68-9bf4-486d0a1fb4ae.png)
您最近一年使用:0次
2020-10-22更新
|
283次组卷
|
4卷引用:吉林省长春市东北师大附中明珠学校2020-2021学年九年级上学期第一次月考数学试题
5 . 【感知】小明同学在学习相似三角形时遇到这样一个问题:
小明发现,过点
作
交
于
,可证明
,得到相关结论后,再利用相似三角形的性质即可得到问题的答案.下面是小明的部分证明过程:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/13/79e71c6d-1ae0-4a65-8b4d-89afb4be0e9b.png?resizew=536)
解:如图①,过点
作
交
于
,则
,
,
∵
是
的中点,
∴
,
∴
,
∴
,
∴
,
∵
是
的一个三等分点,且
,
∴
,
∴
,
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f1b0358987a2bf628d25df3c280150.png)
请你补全余下的证明过程.
【尝试应用】
如图②,在
中,
为
上一点,
,连结
,若
,交
、
于点
、
.若
,
,
,则
的长为______.
【拓展提高】
如图③,在平行四边形
中,点
为
的中点,点
为
上一点,
与
、
分别交于点
、
,若
,则
的值为______.
如图,在![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb9e49c1a0bb7db8b808b805d08c499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee0f36c4d133da7a2b7f6665a46fd325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f1b0358987a2bf628d25df3c280150.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/13/79e71c6d-1ae0-4a65-8b4d-89afb4be0e9b.png?resizew=536)
解:如图①,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb9e49c1a0bb7db8b808b805d08c499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee0f36c4d133da7a2b7f6665a46fd325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01f773ee1d4280f9ef5278c6738c92ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0f317a9a9b7d95f827593f72b223d26.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/532aece6cfd67e2a97977eed978dbf2b.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b70e9557de903cfe3d095cb821abcff6.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78eb5b388afc0437ec7805c5608ebe7.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ac6111180757359050b6af741d12dc.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa61d9f35c4160f319e77be88c7f033.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc63ac949336bc7f62634f359a8593c9.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab0c0e406072a645180d49c3295c73c0.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f1b0358987a2bf628d25df3c280150.png)
请你补全余下的证明过程.
【尝试应用】
如图②,在
![](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/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c51c25b65a37b676ae3c3b71c29f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f21d8e7af78693e5da7957c8034e8bcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
【拓展提高】
如图③,在平行四边形
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c14cbce0fef923b14f40d18c0c15ef23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96690c112163231c015adebd5f138380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/064f3aa6e912fd41811bee2bf9ea1aba.png)
您最近一年使用:0次
6 . 【感知】如图①,在
中,
,
是斜边
上的中线,求证:
.
小明的思路如下:证明:如图①,延长
至点
,使
,连结
,
结合图①,补全证明过程;
【拓展】
(1)如图②,在
中,
,
,点
,
分别是
,
的中点,连结
,
,且
,
,则
的长为______ .
(2)如图③,
和
中,
,
,
,点
在边
的延长线上,连结
,若
,
分别是
,
的中点,
,
,则
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c71622531dfa894f21b2da123d020d24.png)
小明的思路如下:证明:如图①,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0fa1aa5a7a5bb172ed4603f17c8b2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bd97740e8f35c9c05f8bb53c0f1cb47.png)
【拓展】
(1)如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2731722026737ed98c7ef0e0842abc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82773737609e65dea3c5c67099f1b10d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)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/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26813466e2ee49a493881a4384fc8748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.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/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9c3ec174b1ce835cc8737ff6ce57e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2b3247afa684b10c8e1da99cf33d5b.png)
您最近一年使用:0次
7 . 【问题解决】下面是华师版九年级上册数学教材第78页的一道例题.
如图①,在
中,D、E分别是边
、
的中点,
、
相交于点P.
求证:
,
证明:连结DE,
∵D、E分别是边
、
的中点,
请补全证明过程.
【结论应用】
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/5621aed9-10d9-49a7-a4c5-5ce005d2f5f9.png?resizew=551)
(1)如图②,在【问题解决】的条件下,点F是线段
的中点,则
=______.
(2)如图③,在
中,
,
为边
的中线,点E、F分别为边
、
的中点,
与
交于点O,
与
交于点P.则
____.
(3)如图④,在
中,点E、F分别为边
、
的中点,
与
交于点O,将四边形
沿着EF翻折,得到四边形
,点C恰好与点A重合,点D落到点G处,连结
交
于点P,点M是线段
上一点,连结
、
.若
,
,直接写出
的最小值.
如图①,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c64fe2a99d568f6a0fff1bd6d70dca59.png)
证明:连结DE,
∵D、E分别是边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
请补全证明过程.
【结论应用】
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/5621aed9-10d9-49a7-a4c5-5ce005d2f5f9.png?resizew=551)
(1)如图②,在【问题解决】的条件下,点F是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4c4bb07cf484f8673a7060fad524c69.png)
(2)如图③,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eea857dc147f6e2ba6912087a5ca4d71.png)
(3)如图④,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbad16d8800f6d55bd66bd64b1370e4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291a254eab3dd34e843e5dac45fff8de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb3f3690b8ca96413896e5e5eeb3d605.png)
您最近一年使用:0次
名校
8 . 如图是由小正方形组成的
网格,每个小正方形的顶点叫做格点.A、B、C都是格点,点F为
中点.只用无刻度的直尺,在给定的网格中,按下列要求作图,保留作图痕迹.
上作点D,使得
;
(2)如图②,在
上作点E,使得
;
(3)如图③,在
上作点H,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d009739b5b5362c7902eeeada94adb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/012483b715fc59c5f5d253173b802c4c.png)
(2)如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd00869cac36a92bc094d34be31e810.png)
(3)如图③,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98d6f1f210bb21ca470d0b12b156cadd.png)
您最近一年使用:0次
9 . 如图,在每个小正方形的边长为1的网格中,
的顶点
均落在格点上,以
为直径的半圆的圆心为
,仅用无刻度的直尺在给定网格中完成画图.(保留作图痕迹)
上确定一点
,使得
;
(2)在图2中作出
的
边上的高
;
(3)在图3中作出
的切线
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c39832b5afaf002272e3dec2eeae39b0.png)
(2)在图2中作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(3)在图3中作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
您最近一年使用:0次
2024-05-15更新
|
406次组卷
|
7卷引用:吉林省长春市二道区长春市第一〇八学校2023-2024学年九年级上学期12月月考数学试题
吉林省长春市二道区长春市第一〇八学校2023-2024学年九年级上学期12月月考数学试题2024学年吉林省长春市德惠市九年级第一次模拟考试数学模拟试题2023年吉林省长春市第一〇八学校中考数学四模模拟预测题2023年江西省赣州市石城县中考一模数学试卷(已下线)2023年江西一模(无刻度直尺作图)江西省新余市2023-2024学年九年级上学期期末数学试题(已下线)专题12尺规作图题型总结(5大模型+解题技巧)-2024年中考数学答题技巧与模板构建(全国通用)
10 . 图①、图②、图③均是8×8的正方形网格,每个小正方形的边长均为1,每个小正方形的顶点称为格点,
的三个顶点均在格点上,点
为线段
的中点.仅用无刻度的直尺在给定网格中按要求画图,保留作图痕迹.
上作点
,连结
,使
;
(2)在图②中,在线段
上作点
,连结
,使
;
(3)在图③中,在线段
上作点
,连结
,使
.
![](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/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef9d0784478511736255074b9395fae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8871f870debe4d5745eb4b697ca4e594.png)
(2)在图②中,在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb6047a0228d514ad935f42f5bc881c1.png)
(3)在图③中,在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a679040c4d556723e482bacbab41356d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81c810f1ffd122e63cc04c44ef785153.png)
您最近一年使用:0次