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空間中兩向量夾角
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
找出對稱軸
直角坐標平面上的旋轉變換
兩位數加法
三位數除以一位數（一）
異分母分數減法
Discover Resources
將「文字」標示在長與寬
二次函數
證平行四邊形 (對角相等)
圓內接四邊形任務二
Ｑ５
Discover Topics
Statistics
Congruence
Centroid or Barycenter
Volume
Rhombus