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銳角三角：sin, cos
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
異分母分數減法
球体的体积推导
平行線的斜率
球体的体积推导（优化版）
【案例】2013年安徽高考15题
Discover Resources
Visualizing a System of Linear Equations
方形地毯
等腰三角形求角度
[洋葱] 平面直角坐标系中的相似-上(0055)
无理指数幂
Discover Topics
Linear Regression
Similarity Transformation or Similarity
Percentages
Symmetry
Continuity