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練習 - 逆時針旋轉（三角形）
Author:
Lau Sir
Topic:
Triangles
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
算柱 (兩位數)
找出對稱軸
拼砌四邊形
兩位數除以一位數（一）
Discover Resources
了解圓方程(0)
厘米和毫米
不存在的梯子
二次函数问题
河內塔 3D (Tower of Hanoi 3D)
Discover Topics
Cosine
Indefinite Integral
Fractal Geometry
Tangent Line or Tangent
Geometric Transformations