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Author:
Tong Wing Hong
GeoGebra
New Resources
撒针估算面积实验
平行線的判定
第八周作业2
三角函数 的副本
直線的斜率：水平變化 & 鉛垂變化
Discover Resources
Proof of Pythagoras Theorem(1) 畢氏定理的証明(1)
拋物線的疊合
纏繞畫2
我的第一个GGB绘本
數織Nonogram
Discover Topics
Statistical Characteristics
Definite Integral
Trigonometric Functions
Parallelogram
Scalene Triangles