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國二理化_凹面鏡
Author:
林冠曄
GeoGebra
New Resources
百分數及其應用
活动三：应用性质
斐波那契螺旋弧线（表格法）
常见四边形是否是双心四边形
折扣
Discover Resources
旋轉動畫
三角形移動多一格
All in one (centres of triangle)
Addition and Subtraction of Directed Numbers (1)
微分量 (Differentials)
Discover Topics
Vectors
Circle
Isosceles Triangles
Rhombus
Dilation