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Author:
Lin Ching Chieh
GeoGebra
New Resources
判斷球體
拼砌四邊形
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
三位數除以一位數（一）
Discover Resources
全等三角形
小二、小三_時間（教師版）
Remove a data
國旗
Copy of Triangular Number
Discover Topics
Confidence Interval
Intersection
Geometry
Normal Distribution
Tangent Function