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Author:
chen mingchuan
GeoGebra
New Resources
四邉形 (四年級) 教師版
球體建築師
兩位數除以一位數（二）
錐體建築師
畫出對稱圖形
Discover Resources
分數加法和減法
錯角
tan900
congruent triangles_provided by Mr Yeung Kar Chun
探索三角形外角定理
Discover Topics
Histogram
Quadratic Functions
Percentages
Rational Numbers
Arithmetic Operations