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練習 - 逆時針旋轉（三角形）
Author:
Lau Sir
Topic:
Triangles
GeoGebra
New Resources
【案例】圆柱体内放置一个大球六个小球
找出對稱軸
三位數除以一位數（一）
第八周作业
GeoGebra笔记功能体验课件
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happy new year
斜射光三角量測
掃描不等式圖
Linear Programming
我的第一个绘本
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Congruence
Perimeter
Arithmetic Operations
Integral Calculus
Natural Numbers