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congruent activity
Author:
lamanleung
GeoGebra
New Resources
四邉形 (四年級) 教師版
柱體建築師
三位數除以一位數（二）
錐體建築師
三位數除以一位數（一）
Discover Resources
三角形的心
transformation_enlarge/reduction
橢圓1--同心圓法
一次因式檢驗法(2020新版)
分物活動 1
Discover Topics
Cone
Normal Distribution
Optimization Problems
Calculus
Straight Lines