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任意正N边形在圆内滚动顶点的轨迹
Author:
孟宝兴
GeoGebra
New Resources
畫出對稱圖形
四邉形 (四年級) 教師版
找出對稱軸
拼砌四邊形
柱體建築師
Discover Resources
根據百分率找數量（二）: 例3
認識小數
涌动
Is it a condition for //gram?
垂直線的斜率
Discover Topics
Variance
Random Variables
Linear Regression
Straight Lines
Reflection