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圆扇形展开（解释面积公式）
Author:
朱亮
GeoGebra
New Resources
四邊形的特性
算柱 (兩位數)
畫出對稱圖形
GeoGebra笔记功能体验课件
錐體建築師
Discover Resources
整數或分數÷分數_ 工作紙（一）_題1b
Locus 軌跡(6)
立方體展開圖
GGB10
翰林數學_2下_CH3-1_三角形的內角與外角
Discover Topics
Polygons
Algebra
Congruence
Median Line
Tree Diagrams