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學習單：三角形內(外)角合
Author:
Tsai, Dung Jung
,
Tim Brzezinski
GeoGebra
GeoGebra
New Resources
兩組對邊相等的四邊形
【案例】圆柱体内放置一个大球六个小球
錐體建築師
兩位數加法
畫出對稱圖形
Discover Resources
五邊形中點
拋物線
[問題] 行列式 = 0 的機率
小數的認識（一）
数线段
Discover Topics
Normal Distribution
Rotation
Sequences and Series
Prism
Coordinates