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congruent (SA) 2
Author:
Ricky Chan
GeoGebra
New Resources
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
球體建築師
GeoGebra笔记功能体验课件
Discover Resources
Platonic Solids 柏拉圖立體
象形圖 (找出最多/最少)
外積分配律
test
二次函數中常數項所扮演的角色：向上移動的副本
Discover Topics
Curve Sketching
Ellipse
Root
Set Theory
Probability