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固定周界的長方形面積變化
Author:
GeoGebra Institute of Hong Kong
Topic:
Area
,
Perimeter
,
Square
GeoGebra
New Resources
拼砌四邊形
兩組對邊相等的四邊形
球体的体积推导（优化版）
判斷球體
四邊形的特性
Discover Resources
三角形的重心軌跡
Circumcentre
冰淇淋
拋物線有範圍限制的極值
点阵
Discover Topics
Vectors 2D (Two-Dimensional)
Binomial Distribution
Hypothesis Testing
Constructions
Arithmetic Operations