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劉德晧proof14
Author:
郭亮偉
GeoGebra
New Resources
球體建築師
異分母分數減法
找出對稱軸
判斷球體
柱體建築師
Discover Resources
閱讀鐘面及數字鐘（時和分）
正三角形的旋轉
立體圖形－截面
費氏螺旋 (基本作圖)
任意角的生成
Discover Topics
Inequalities
Mode
Cosine
Incircle or Inscribed Circle
Surface