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旋轉對稱 Rotational symmetry
Author:
TANG TSZ YUEN
Topic:
Symmetry
GeoGebra
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三位數除以一位數（二）
画直线等分三角形的面积
畫出對稱圖形
兩位數除以一位數（一）
【案例】圆柱体内放置一个大球六个小球
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区域面积
旋轉動畫
Locus (Non parallel lines)
P.4對稱
電工機械及基本電學圖解
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Interest Calculation
Geometry
Translation
Fractions
Constructions