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角的大小與角兩臂的長度有關？
Author:
cwc
GeoGebra
New Resources
球体的体积推导
球体的体积推导（优化版）
異分母分數減法
拼砌四邊形
四邊形的特性
Discover Resources
畫三角形 題1e
自行车运动
畢氏定理證明
Angle between a Line and a Plane
對數函數
Discover Topics
Congruence
Similarity Transformation or Similarity
Geometric Transformations
Geometric Distribution
Differential Calculus