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Author:
dhc987
GeoGebra
New Resources
圓周公式的應用
画直线等分三角形的面积
兩位數加法
球体的体积推导（优化版）
多邊形的面積
Discover Resources
費氏螺旋 (基本作圖)
US Unemployment 200701~201707
Trigonometric Ratios of Any Angle
廣義三角：tan
等腰三角形
Discover Topics
Means
Logarithmic Functions
Intersection
Arithmetic Mean
Vectors