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四則
Author:
周錦鋒
GeoGebra
New Resources
球體建築師
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
畫出對稱圖形
算柱 (兩位數)
Discover Resources
波的干涉 Wave Interference
探究平行四邊形面積(2)
圓圈圈
同心圓
整數
Discover Topics
Root
Surface
Logarithmic Functions
Trigonometry
Intersection