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平行四邊形教材
Author:
蔡敏蓁
GeoGebra
New Resources
兩位數加法
拼砌四邊形
兩組對邊相等和有直角的四邊形
四邊形的特性
異分母分數減法
Discover Resources
可變大的圓桌
凸型表面積計算（平移部分面、角度轉換法）
圆柱截方
二次函數a的意義
等距曲线ggb作图法
Discover Topics
Difference and Slope
Functions
Similar Triangles
Arithmetic Mean
Combinatorics