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銳角三角：sin, cos
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
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GeoGebra笔记功能体验课件
畫出對稱圖形
兩組對邊相等和有直角的四邊形
第八周作业
異分母分數減法
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乘法表的自动练习
Platonic Solids 柏拉圖立體
Hypocycloid Wheel
Copia de 模版 - 無框黑板
热带风暴storm
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Square
Continuity
Area
Integers
Geometric Transformations