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Author:
許瑞霖
10638
GeoGebra
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判斷球體
兩位數除以一位數（一）
算柱 (兩位數)
異分母分數減法
【案例】圆柱体内放置一个大球六个小球
Discover Resources
Conic section
ggxfs 凹面鏡的反射成像
林辰洋 凹面鏡反射
旋轉圓弧
河內塔 3D (Tower of Hanoi 3D)
Discover Topics
Quadrilaterals
Trigonometric Functions
Numbers
Limits
Rational Numbers