文件内容:
file:201余弦.mp4
file:205解直角三角形应用.mp4
file:202正切.mp4
file:204解直角三角形.mp4
file:203特殊角的三角函数值.mp4
file:200正弦.mp4
file:168等腰三角形.mp4
file:164轴对称图形.mp4
file:170等边三角形.mp4
file:165关于直线对称.mp4
file:166垂直平分线.mp4
file:167画轴对称图形.mp4
file:169等角对等边.mp4
file:49分式的加减.mp4
file:52分式的乘方.mp4
file:45分数与分式.mp4
file:48通分.mp4
file:47约分.mp4
file:51分式的除法.mp4
file:53整数指数幂.mp4
file:46分式基本性质.mp4
file:50分式的乘法.mp4
file:216弧长.mp4
file:215正多边形.mp4
file:207垂径定理.mp4
file:213切线长定理.mp4
file:212切线.mp4
file:214圆与圆的位置关系.mp4
file:218圆锥及展开图形.mp4
file:209圆周角.mp4
file:210点和圆的位置关系.mp4
file:217扇形面积.mp4
file:211直线和圆的位置关系.mp4
file:208圆心角、弧、弦.mp4
file:206圆.mp4
file:115交点法求二次函数解析式.mp4
file:116二次函数实际应用-利润.mp4
file:109y=a(x-h)^2+k第一课时.mp4
file:110y=a(x-h)^2+k第二课时.mp4
file:114顶点法求二次函数解析式.mp4
file:117二次函数实际应用-数字模型.mp4
file:111y=ax^2+bx+c.mp4
file:113待定系数法求解析式.mp4
file:108y=ax^2.mp4
file:107什么是二次函数.mp4
file:112一般式和顶点式的转化.mp4
file:180中位线定理.mp4
file:178平行四边形判定三.mp4
file:187正方形判定.mp4
file:184菱形.mp4
file:176平行四边形判定一.mp4
file:185菱形的判定.mp4
file:174平行四边形性质.mp4
file:186正方形.mp4
file:183矩形判定.mp4
file:179平行四边形判定四.mp4
file:182斜边中线定理.mp4
file:181矩形.mp4
file:175平行四边形对角线互相平分.mp4
file:177平行四边形判定二.mp4
file:27算数平方根.mp4
file:29立方根.mp4
file:28平方根.mp4
file:30实数的分类.mp4
file:31同底数幂的乘法.mp4
file:37同底数幂除法.mp4
file:41完全平方公式.mp4
file:44因式分解完全平方差公式法.mp4
file:32幂的乘方.mp4
file:33积的乘方.mp4
file:35整式的乘法单项式乘以多项式.mp4
file:38单项式除以单项式.mp4
file:40平方差公式.mp4
file:36多项式乘以多项式.mp4
file:34整式的乘法单项式乘以单项式.mp4
file:42因式分解提公因式.mp4
file:39多项式除以单项式.mp4
file:43因式分解平方差公式法.mp4
file:133相交线.mp4
file:139平行线判定方法一（同位角）.mp4
file:135对顶角.mp4
file:140平行线判定方法二（内错角）.mp4
file:141平行线判定方法三（同旁内角）.mp4
file:136垂直、垂足.mp4
file:134邻补角.mp4
file:138平行线.mp4
file:143平行线判定方法五（内错角相等两直线平行）.mp4
file:144平行线判定方法六（同旁内角互补两直线平行）.mp4
file:137垂线段最短.mp4
file:142平行线判定方法四（同位角相等两直线平行）.mp4
file:225概率.mp4
file:226列表法求概率.mp4
file:227树状图求概率.mp4
file:224随机事件.mp4
file:83解一元二次方程-利用公式分解法.mp4
file:85根与系数的关系.mp4
file:81解一元二次方程-公式法.mp4
file:86一元二次方程的应用.mp4
file:80解一元二次方程-配方法.mp4
file:79解一元二次方程-直接开平方法.mp4
file:82解一元二次方程-提公因式法.mp4
file:84解一元二次方程-十字相乘法.mp4
file:78什么叫一元二次方程.mp4
folder:初中全套数学（227节高清视频）秒懂百科：一本行走的数学字典
folder:25.锐角三角函数
folder:20.轴对称
folder:05.分式
folder:26.圆
folder:14.二次函数
folder:22.平行四边形
folder:03.实数
folder:04.整式的乘法与因式分解
folder:17.相交线与平行线
folder:28.概率初步
folder:10.一元二次方程
folder:12.平面直角坐标系
folder:21.勾股定理
folder:23.旋转
folder:08.二元一次方程
folder:16.几何图形初步认识
folder:13.一次函数
folder:24.相似
folder:18.三角形
folder:01.有理数
folder:02.整式
folder:06.二次根式
folder:11.等式与不等式组
folder:07.一元一次方程
folder:09.分式方程
folder:15.反比例函数
folder:19.全等三角形
folder:27.数据的分析