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製作梯形1 Making trapezium 1
Author:
周錦鋒
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
柱體建築師
找出對稱軸
三位數除以一位數（二）
兩位數除以一位數（一）
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multiplication of complex number in unit circle
过圆上一点作切线，三步
七巧板綜合的副本
圆柱沿着螺线展开成平行四边形
數值滑桿動畫
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Probability
Calculus
Equations
Congruence
Geometric Transformations