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練習 - 逆時針旋轉（三角形）
Author:
Lau Sir
Topic:
Triangles
GeoGebra
New Resources
GeoGebra笔记功能体验课件
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
兩位數加法
拼砌四邊形
Discover Resources
四邊形
交點軌跡動態
圖形的內部、外部與周界
Geometry: Types of Angles 2 (幾何：角的種類 2)
多边形旋
Discover Topics
Standard Deviation
Optimization Problems
Histogram
Probability
Boxplot