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平方差
Author:
連琨銘
GeoGebra
New Resources
找出對稱軸
兩位數加法
兩位數除以一位數（二）
四邉形 (四年級) 教師版
兩組對邊相等和有直角的四邊形
Discover Resources
任務2
用正多邊形面積逼進圓周率
reflectional symmetry_6
Copy of 數線的繪製
Quiz on Solving One-step Linear Equations (1)
Discover Topics
Sequences and Series
Tangent Line or Tangent
Linear Programming or Linear Optimization
Differential Calculus
Constructions