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正三角形
Author:
陳幽靈
Topic:
Equilateral Triangles
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GeoGebra笔记功能体验课件
拼砌四邊形
找出對稱軸
四邉形 (四年級) 教師版
兩組對邊相等的四邊形
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waaachen
餘弦定理的圖形證明
Hoehn's Theorem
Flips
時鐘
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Cylinder
Standard Deviation
Integral Calculus
Straight Lines
Rectangle