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动态三角形
Author:
GeoGebra Institute of WuXi
if指令的应用
GeoGebra
New Resources
異分母分數減法
拼砌四邊形
GeoGebra笔记功能体验课件
兩組對邊相等的四邊形
三位數除以一位數（一）
Discover Resources
waaachen
用面積逼近圓周率
量度活動所用的時間 (時、分、秒)
國旗
省政信箱
Discover Topics
Angles
Solids or 3D Shapes
Rhombus
Limits
Unit Circle