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旋轉動畫
Author:
Ching-Hui Chou
GeoGebra
New Resources
兩位數除以一位數（一）
錐體建築師
兩組對邊相等的四邊形
拼砌四邊形
直角坐標平面上的旋轉變換
Discover Resources
Clock24hour
三角函數的疊合
證明三角形內角和180度
Copy of 根據百分率找數量（一）: 例2
Copy of 劉徽的「割圓術」
Discover Topics
Reflection
Tangent Function
Equilateral Triangles
Histogram
Trigonometry