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1 . (1)计算:
.
(2)解方程组
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10b8294c53e853921e25bc2fa924a48.png)
(2)解方程组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c65462a7f5604049ec2efc376a3091d.png)
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2 . 在学习《解直角三角形》一章时,小明同学对互为倍数的两个锐角正切三角比产生了浓厚的兴趣,进行了一些研究.
, 发现结论:
; (选填“
”或“
”)
(2)实践探究: 如图1, 在
中,
,
,
,求
的值:小明想构造包含
的直角三角形: 延长
至点
,使得
,连接
,所以得到
,即转化为求
的正切值.请按小明的思路求解
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/541f3ec692e1ff98088a308efb0c44e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61e551f3af8330e755046ed671d77e60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42c5803ddf3ee62f21b622131472b98c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411837b4b3078d05b43cb0439259a362.png)
(2)实践探究: 如图1, 在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a9be4fb13650250d8878addc0de8d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91b89d96a6efb8e54296265f0de5e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef9dd1923bb007652633a32053778cda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2217de2d19252626acd34637378d194.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c543c3ddc3723fde6bbfca3ea3b921b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9d389514048fe7302e9b4726d41aad0.png)
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3 . 某兴趣小组在数学项目式学习活动中拟做以下探究:在
中,
,
是
边上一点,且
(
为正整数),
是
边上的动点,过点
作
的垂线交直线
于点
.
【初步感知】(1)如题1图,当
时,该兴趣小组探究得出结论:
,请写出证明过程;
【深入探究】(2)如题2图,当
时且点
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;
【深入探究】(3)请通过类比、归纳、猜想、探究,归纳出线段
之间数量关系的一般结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fd65ce36094bb2836c2124f646c4eee.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/825671c551cc4593793b40c43d46757a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
【初步感知】(1)如题1图,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36978e392c8df4668ed3f74641febbfe.png)
【深入探究】(2)如题2图,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2d3df37e73a8abea815f37dbb3fff5.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/e30bf3421adec0637c315309c2ea9a24.png)
【深入探究】(3)请通过类比、归纳、猜想、探究,归纳出线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30bf3421adec0637c315309c2ea9a24.png)
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4 . 如图,四边形
是矩形,点A,C别在x轴,y轴上,点B的坐标是
,
的平分线与x轴交于点E.
的长;
(2)求直线
的解析式;
(3)连接
,交
于点F,连接
,点N是平面内任意一点;
①求出
所在直线的解析式及点F坐标;
②在x轴上是否存在点M,使得以O,F,M,N为顶点且以
为边的四边形为菱形?若存在,请直接写出点M的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/238f0ea276a00ae8d681ce00cc11c8ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22f9341d51c827a29a4a0b0b3dded16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
①求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
②在x轴上是否存在点M,使得以O,F,M,N为顶点且以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
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5 . 如图1,矩形
摆放在平面直角坐标系中,点
在
轴上,点
在
轴上,
,
,过点
的直线交矩形
的边
于点
,且点
不与点
重合,过点
作
,
交
轴于点
,交
轴于点
.
为等腰直角三角形
直接写出此时
点的坐标: ;直线
的解析式为 .
在
轴上另有一点
的坐标为
,请在直线
和
轴上分别找一点
,使
的周长最小,并求出此时点
的坐标和
周长的最小值;
(2)如图
,过点
作
交
轴于点
,若以
为顶点的四边形是平行四边形,求直线
的解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb2d3f02cb9007cd4a90ea30f6dd8181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85bdcc2742be52cc80ba7dbe79f9a574.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6b93dbe5272a5167ff4e2918bec864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c586719b7790641696b772c47293a361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7fbd6b9f85c086ac95562fe45e8d969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c0573e2af8a0dc8c6a1c0af067a324f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/102716b8d55b91adb37dfe019cc7231b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/102716b8d55b91adb37dfe019cc7231b.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b108f80f43530b66696e423aa52444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545197f6e10a28175dd9c6ffff9cd305.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
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6卷引用:广东省梅州市丰顺县石江中学2022-2023学年九年级上学期12月月考数学试卷
广东省梅州市丰顺县石江中学2022-2023学年九年级上学期12月月考数学试卷天津市南开区2018-2019年八年级第二学期期末试卷数学试题天津市滨海新区2020-2021学年八年级下学期期末数学试题(已下线)专题9.50 平行四边形(最值问题)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(苏科版)(已下线)专题09一次函数的综合运用题(六大题型)【好题汇编】-备战2023-2024学年八年级数学下学期期末真题分类汇编(天津专用)(已下线)专题02 一次函数与几何图形综合九种常见题型解题技巧【暑假自学课】-2024年新九年级数学暑假提升精品讲义(人教版)
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6 . 如图,点C、E、B、F在一条直线上,
.
;
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb59d954acae3620f48154e624e8221.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac61f3477e623aa4f924a82bd7a06ce4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/000f23c6259711336bdbf68fa3af234d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
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7 . 如图,点
、
在
上,且
.求证:
.
![](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/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca870b77f51a4f83e1dae16621eb203b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/226e9c751b7cc63add206f9b48020cc9.png)
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9卷引用:2024年广东省广州市第二中学中考二模数学试题
2024年广东省广州市第二中学中考二模数学试题江苏省宿迁市泗阳县2023-2024学年八年级上学期期末数学试题2024年福建省南平市光泽县第一中学中考模拟数学试题2024年云南省云南师范大学附属中学呈贡校区九年级数学月考题(五)(已下线)专题04 三角形(考点清单)-2023-2024学年七年级数学下学期期中考点大串讲(北师大版)(已下线)专题04 三角形(考点清单)-2023-2024学年七年级数学下学期期末考点大串讲(北师大版)2024年云南省玉溪市通海县初中学业水平考试模拟数学试题(已下线)北师大版七年级数学下学期期末模拟试卷01-2023-2024学年七年级数学下学期考试满分全攻略高频考点+重难点讲练与测试(北师大版)(已下线)第02讲 探索三角形全等的条件(SAS+ASA)(6大核心考点)-【暑假自学课】2024年新八年级数学暑假提升精品讲义(苏科版)
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8 . 如图,在
中,
为
上一点,
为
中点,连接
并延长至点
,使得
,连
.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b00a5239269d72d6f9632e7d77347106.png)
(2)若
,
,
,求
的度数.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4d3d4307b9f64d8c99f864941f37874.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b00a5239269d72d6f9632e7d77347106.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e702e136211878dce558e0457f15df63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3ce1a8a24c6c84231aab16d2a97be3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d320f180419175d75eebc618cc458b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3de20ba8bda63c650ef571be155702.png)
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8卷引用:广东省深圳市龙岗区2022-2023学年八年级上学期期末考试数学试题
广东省深圳市龙岗区2022-2023学年八年级上学期期末考试数学试题广东省深圳市福田区深圳实验学校中学部2023-2024学年七年级下学期期中数学试题广东省深圳市罗湖外语初中学校2023-2024学年七年级下学期期中数学试题辽宁省丹东市凤城市2023-2024学年八年级上学期期末数学试题2024年江苏省苏州市昆山市六校联考中考一模数学模拟试题(已下线)数学(江苏南通卷)-学易金卷:2024年中考考前押题密卷(已下线)七年级期末数学试卷01-2023-2024学年七年级数学下学期期末考点大串讲(北师大版)(已下线)第02讲 探索三角形全等的条件(SAS+ASA)(6大核心考点)-【暑假自学课】2024年新八年级数学暑假提升精品讲义(苏科版)
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9 . 计算:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/208b2ce813326ba50e867208c707833f.png)
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10 . 如图,一架长
的梯子
斜靠在墙
上,
,此时,梯子的底端B离墙底C的距离
为
.求此时梯子的顶端A距地面的高度![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b503e63e24d85326a19e7e61a51e72db.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/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cc3d63940836d7cfbb7d3eead8c3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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