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梯形的計算題練習
Author:
学用数学
GeoGebra
New Resources
畫出對稱圖形
找出對稱軸
錐體建築師
算柱 (兩位數)
三位數除以一位數（二）
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廣義角
旋轉動畫
立體圖形
Gauss Seidel 線性迭代求解
Modular Surface：1 / (1 + z²)
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Angles
Secant Line or Secant
Terms
Cone
Triangles