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面鏡的反射
Author:
dunst kang
GeoGebra
New Resources
拼砌四邊形
兩位數除以一位數（二）
兩位數加法
兩位數除以一位數（一）
四邉形 (四年級) 教師版
Discover Resources
對稱求最小
相似形
Copy of Area of square
Control a, b and c in quadratic function
因數（1至24）
Discover Topics
Difference and Slope
Equilateral Triangles
Hyperbola
Set Theory
Linear Functions