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Author:
军云
GeoGebra
New Resources
百分數及其應用
垂直線的斜率
圓的切線方程
常见四边形是否是双心四边形
平行線的斜率
Discover Resources
蝴蝶定理證明2：綜合法
函數圖形的變化（Ⅱ）
眼睛的毛病(近視及遠視)
餘弦公式2
圆锥曲线
Discover Topics
Square
Integral Calculus
Cuboid
Vectors 2D (Two-Dimensional)
Isosceles Triangles