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13-正多边形在直线上滚动
Author:
龚洪萍
GeoGebra
New Resources
三位數除以一位數（一）
漂亮的摇摆曲线
垂直線的斜率
直線的斜率
画直线等分三角形的面积
Discover Resources
平行四邊形與菱形的分別
Trigonometric Ratios of Any Angle
圓 點 直線的副本
Inclined plane (Angle between two planes)
切線 (The Tangent Line)
Discover Topics
Exponential Functions
Vectors
Surface
Perimeter
Quadratic Functions