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pisa tower
Author:
faanyat
GeoGebra
New Resources
撒针估算面积实验
百分數及其應用
平行線的判定
直線的斜率：水平變化 & 鉛垂變化
科氏力 (Coriolis Force)
Discover Resources
電子幾何條（2014）
因數的判別
初三作业
吃點點
算幾不等式
Discover Topics
Coordinates
Percentages
Vectors 2D (Two-Dimensional)
Polygons
Trigonometric Functions