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同心圓和線段-3(線段到最外圓有小圓)
Author:
jessice
GeoGebra
New Resources
四邊形的特性
小数 的副本
找出對稱軸
三位數除以一位數（一）
直角坐標平面上的旋轉變換
Discover Resources
Slope 斜率 - 概念及定義 (3)
旋轉動畫
活動所需時間計算機 (24小時報時制)
題七
I love Taiwan.(可縮放和移動)
Discover Topics
Linear Equations
Fractions
Equilateral Triangles
Area
Statistical Characteristics