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S12G4 長方形內夾正方形的周長問題
Author:
学用数学
GeoGebra
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兩位數除以一位數（二）
三位數除以一位數（一）
畫出對稱圖形
錐體建築師
找出對稱軸
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Polygonal numbers
EX3.18
畢氏定理習作
q5-11
x^3导数求导
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Curve Sketching
Volume
Definite Integral
Mode
Indefinite Integral