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Author:
johnmayhk
GeoGebra
New Resources
兩位數除以一位數（一）
畫出對稱圖形
画直线等分三角形的面积
四邉形 (四年級) 教師版
四邊形的特性
Discover Resources
Escher 階梯 (Penrose Stair)
test area
線型函數
雙曲線的漸進線
立體圖形的特徵
Discover Topics
Orthocenter
Hypothesis Testing
Calculus
Real Numbers
Linear Programming or Linear Optimization