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congruent (AAA) 2
Author:
Ricky Chan
GeoGebra
New Resources
兩位數加法
兩組對邊相等的四邊形
錐體建築師
四邉形 (四年級) 教師版
GeoGebra笔记功能体验课件
Discover Resources
Trajectory of system: y'=sin(y)-y/2
rabbit
中一︰相似圖形（平移、旋轉、反射、放大縮小）
多邊形周界A
勝者即正義
Discover Topics
Logic
Interest Calculation
Pie Chart or Circle Chart
Boxplot
Ratios