圆的知识点整理初三
作者:值友5978884058
九年级下册历史思维导图来喽!九年级下册历史思维导图来喽!九年级下册历史思维导图来喽!重要的事情说三遍,为了更好地帮助学生梳理知识点、把握学习重点,本文将为大家免费分享一份九年级下册历史的思维导图高清版。这份思维导图涵盖了教材中的所有核心知识点,是学生们复习、预习的必备工具。建议大家收藏这份思维导图,以便随时查阅。
九年级下册历史思维导图大纲
![](https://p0.ssl.img.360kuai.com/t014c7cdb980e9ef624.jpg)
九年级历史下册第一单元殖民地人民的反抗与资本主义制度的扩展
主要讲述了18世纪末19世纪初,在欧洲殖民统治下的美洲和亚洲的反抗运动,以及资本主义制度在这些地区的扩展情况。这些历史事件对世界历史产生了深远的影响,激励了人们为争取民族独立和自主发展而奋斗。
![](https://p0.ssl.img.360kuai.com/t013dad5b7a817f64fd.jpg)
殖民地人民的反抗斗争
![](https://p0.ssl.img.360kuai.com/t018ae4894a99984458.jpg)
俄国的改革
![](https://p0.ssl.img.360kuai.com/t018e2779f71ba18264.jpg)
美国内战
日本明治维新
![](https://p0.ssl.img.360kuai.com/t01d5b70df302caeb06.jpg)
九年级历史下册第二单元第二次工业革命和近代科学文化
介绍了19世纪末至20世纪初的科学技术和文化的重大进展,以及这些发展对人类社会和经济发展的影响。
![](https://p0.ssl.img.360kuai.com/t01a7061effff7cf52f.jpg)
第二次工业革命
![](https://p0.ssl.img.360kuai.com/t018b60614145ef0698.jpg)
工业化国家的社会变化
![](https://p0.ssl.img.360kuai.com/t01e77de218b054fd2d.jpg)
近代科学与文化
![](https://p0.ssl.img.360kuai.com/t01286cc24b5700d2a1.jpg)
九年级历史下册第三单元
第一次世界大战
![](https://p0.ssl.img.360kuai.com/t01b773cdc64cb4d2b5.jpg)
列宁与十月革命
![](https://p0.ssl.img.360kuai.com/t0127c894ca4c1f58c4.jpg)
《凡尔赛条约》和《九国公约》
![](https://p0.ssl.img.360kuai.com/t013487f4974d76e585.jpg)
苏联的社会主义建设
![](https://p0.ssl.img.360kuai.com/t01bc821ba7f8ddbc84.jpg)
亚非拉民族民主运动的高涨
![](https://p0.ssl.img.360kuai.com/t01764648401a2d7b64.jpg)
九年级历史下册第四单元经济大危机和第二次世界大战
经济大危机和第二次世界大战对世界历史产生了深远的影响。在经济方面,各国政府加强了对经济的干预,推行了一系列国家资本主义政策。在政治方面,国际关系紧张,国际合作与同盟关系形成,最终导致了全球性的军事冲突。
罗斯福新政
![](https://p0.ssl.img.360kuai.com/t012efd9b27ca26d004.jpg)
法西斯国家的侵略扩张
![](https://p0.ssl.img.360kuai.com/t01aabb1374a2dcadfd.jpg)
第二次世界大战
![](https://p0.ssl.img.360kuai.com/t01145db69538309725.jpg)
九年级历史下册第五单元冷战和美苏对峙的世界
冷战
![](https://p0.ssl.img.360kuai.com/t01c402ea8c6b69e4e9.jpg)
战后资本主义的新变化
![](https://p0.ssl.img.360kuai.com/t010fe2e199476d10d4.jpg)
亚非拉国家的新发展
![](https://p0.ssl.img.360kuai.com/t0129313068b77a1954.jpg)
社会主义的发展与挫折
![](https://p0.ssl.img.360kuai.com/t01887bc2435d2dd5ae.jpg)
九年级历史下册第六单元冷战结束后的世界
![](https://p0.ssl.img.360kuai.com/t0159bd833c3b9ede94.jpg)
联合国与世界贸易组织
![](https://p0.ssl.img.360kuai.com/t010035dad175ada6ce.jpg)
冷战后的世界格局
![](https://p0.ssl.img.360kuai.com/t015a39a4409b783433.jpg)
不断发展的现代社会
![](https://p0.ssl.img.360kuai.com/t01ccd414903c63263c.jpg)
以上是九年级下册历史思维导图的合集内容,每一单元都有,通过这份思维导图,学生们可以更好地理解九年级下册历史的知识点,把握历史发展的脉络。这份思维导图不仅是一个复习工具,更是一个开启历史知识宝库的钥匙。需要电子版也可以去知犀思维导图领取哦~
关键词:九年级下册历史思维导图,历史思维导图,思维导图
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仰晴珠1078圆的各个公式,不是计算公式都说了不是计算公式啊,初三数学上有关圆的各个知识点好吧 -
殳行陆17174715263 ______[答案] 1、r2=x2+y2(r为圆的径,x、y为圆上各点的坐标) 这不是计算公式,这是圆的函数表达式.
仰晴珠1078初三数学圆的知识 -
殳行陆17174715263 ______ 两圆相切的话,圆心距=半径和=5+12=17cm 两圆相交的话,圆心距=√(5²+12²)=13cm
仰晴珠1078初三圆的知识 -
殳行陆17174715263 ______ 从C向AB作垂线交AB于Z.设内切圆的直径是d, GC = x, EB = y BC = x + y CZ = d, ZB = 8-4 =4 CD = x + d/2 = 4, x = 4-d/2 AB = y + d/2 = 8, y = 8-d/2 x + y = 12 -d BCZ是直角三角形,d^2 + 4^2 = (x+y)^2 = (12-d)^2 解得d=16/3
仰晴珠1078求初三数学 圆这章知识点 -
殳行陆17174715263 ______ 圆的特征:圆是由一条曲线构成的封闭图形,圆上任意一点到圆心的距离相等. 圆心和半径的作用:圆心决定圆的位置,半径决定圆的大小 . 圆是轴对称图形,直径所在的直线是圆的对称轴.圆有无数条对称轴 . 同一圆中直径是半径的2倍 ...
仰晴珠1078数学 初三圆的知识
殳行陆17174715263 ______ 阴影是不是大圆面积减去小圆面积 是9多少 9π吗 答案是C 过O做AB垂线,垂足D. 三角形ODB中,BD平方=OB平方-OD平方即大圆半径平方-小圆半径平方 所以得BD=3 所以AB=6 1、因为ABCD为平行四边形,根据对称性可知,AE=AF,且AC平分角C,则EFC为以AC为顶角平分线的等腰三角形,所以EF垂直AC,所以E与F必定处于以AC为直径,AC中点为圆心的圆上.... 2、同样,平行四边形对成性可以直接得到结论... PS:平行四边形对成性:当一个平行四边形被对角线分割成2个全等三角形时(比如AC),在2个三角形内做的任何对应相同的改变,得出的结论成立
仰晴珠1078九年级数学”圆“的知识 -
殳行陆17174715263 ______ 当OP为斜边的时候最长,当OP垂直AB时最短. 解: 1.当P与A重合时,OP最长. 此时OP=r=5 2.当OP垂直AB时,OP最短. 在Rt△OPA中,OP=√OA²-AP²=√5²-4²=3 ∴综上所述.3≤OP≤5 哪一步不明白,可以追问.
仰晴珠1078初三圆的知识
殳行陆17174715263 ______ 1.AB=2倍根号3(cm) 弦心距=1cm 2.弦心距=根号2(cm)
仰晴珠1078九年级数学圆这一章的全部知识点
殳行陆17174715263 ______ ⑴圆的确定:不在同一直线上的三个点确定一个圆. 圆的对称性质:圆是轴对称图形,其对称轴是任意一条通过圆心的直线.圆也是中心对称图形,其对称中心是圆心. 垂径定理:垂直于弦的直径平分这条弦,并且平分弦所对的2条弧.逆定理...
仰晴珠1078数学初三圆的知识
殳行陆17174715263 ______ 正确结论:弧BD=弧CD 三角形ACB相似于三角形OEB、 连接DB,在三角形DEB中用勾股定理求出DB=2根号5 BEXCE=DEXAE 4X4=2AE AE=8 AD=10 在三角形ADB中运用勾股定理求出AB=4根号5 半径为2根号5
仰晴珠1078初三数学圆的知识
殳行陆17174715263 ______ 1、因为ABCD为平行四边形,根据对称性可知,AE=AF,且AC平分角C,则EFC为以AC为顶角平分线的等腰三角形,所以EF垂直AC,所以E与F必定处于以AC为直径,AC中点为圆心的圆上.... 2、同样,平行四边形对成性可以直接得到结论... PS:平行四边形对成性:当一个平行四边形被对角线分割成2个全等三角形时(比如AC),在2个三角形内做的任何对应相同的改变,得出的结论成立