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W1G6 黃金矩形
Author:
呂紹行
GeoGebra
New Resources
球體建築師
四邉形 (四年級) 教師版
異分母分數減法
三位數除以一位數（一）
畫出對稱圖形
Discover Resources
平面鏡成像 Image of Plane Mirror Reflection
周界-平移法(練習三)
folding aeroplane
三角形內角和180度
圓面積示範
Discover Topics
Subtraction
Linear Programming or Linear Optimization
Pythagoras or Pythagorean Theorem
Linear Regression
Reflection