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Author:
季阳天
GeoGebra
New Resources
直角坐標平面上的旋轉變換
四邉形 (四年級) 教師版
找出對稱軸
兩位數除以一位數（一）
畫出對稱圖形
Discover Resources
國道計程收費
圓外冪問題
圓內接正N邊形
圓錐截痕模型
用方程解周界問題
Discover Topics
Orthocenter
Set Theory
Definite Integral
Means
Equations