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正20面體展開
Author:
GEOGEBRA啟
GeoGebra
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算柱 (兩位數)
兩位數除以一位數（一）
四邉形 (四年級) 教師版
畫出對稱圖形
【案例】圆柱体内放置一个大球六个小球
Discover Resources
三角形內角和
三角函數的性質
Fractal Roulette
地球－分區著色
翹翹板
Discover Topics
Vectors 2D (Two-Dimensional)
Trigonometry
Congruence
Mode
Mathematics