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練習 - 逆時針旋轉（三角形）
Author:
Lau Sir
Topic:
Triangles
GeoGebra
New Resources
異分母分數減法
兩組對邊相等和有直角的四邊形
判斷球體
錐體建築師
GeoGebra笔记功能体验课件
Discover Resources
圓形的西洋棋盤
gyzqx 共頂點的圓錐曲線
圓形
相反数 探究 （教材第9页）
勒洛四面体（拼接法）
Discover Topics
Quadratic Functions
Rational Numbers
Rotation
Median Line
Arithmetic