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周界
Author:
YIP
,
Anthony OR 柯志明
GeoGebra
GeoGebra
New Resources
四邊形的特性
柱體建築師
拼砌四邊形
三位數除以一位數（一）
画直线等分三角形的面积
Discover Resources
Rotational Symmetry
包絡線2
Copy of 固定面積的圖形的周界變化
Copy of 均分除法（分數÷整數）
动态展开圆柱体
Discover Topics
Quadrilaterals
Reflection
Exponent
Optimization Problems
Planes