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銳角三角：sin, cos
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
【案例】圆柱体内放置一个大球六个小球
兩位數加法
畫出對稱圖形
四邊形的特性
球体的体积推导（优化版）
Discover Resources
籐編直線與曲線
教學－直線方程性質
S5 Permutation and Combination
XY04 成都地铁
初中数学教材配套资源【人教】
Discover Topics
Confidence Interval
Division
Algebra
Incircle or Inscribed Circle
Cosine