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三角函數的性質
Author:
yuchengda
GeoGebra
New Resources
球體建築師
兩位數除以一位數（一）
錐體建築師
【案例】圆柱体内放置一个大球六个小球
兩位數加法
Discover Resources
Measurement & Classification of Angles 角的量度和分類
直线与椭圆
左右
畫圓
七巧板（tangram）的副本
Discover Topics
Quadratic Equations
Continuity
Hypothesis Testing
Planes
Scatter Plot