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Proof1 彭凱揚
Author:
郭亮偉
GeoGebra
New Resources
找出對稱軸
四邉形 (四年級) 教師版
異分母分數減法
小数 的副本
三位數除以一位數（二）
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一个圆的若干竞赛异型题
梯形
圓周 (圖形G)
Gazing Cow Problem (c)
「相似三角形」任务5的副本
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Random Experiments
Cylinder
Surface
Differential Calculus
Arithmetic