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spherical coordinates
Author:
Wu Xiao-Ren
GeoGebra
New Resources
第三周作业效果演示
盈利與虧蝕
第八周作业2
平行線的判定
直線的斜率：水平變化 & 鉛垂變化
Discover Resources
函數的面積 (黎曼和)
Triangle
斯霍滕(Schooten)定理(與角平分線定理等價)
x²+y²+z²的取值范围
基本不等式
Discover Topics
Trapezoid
Correlation
LCM and GCD
Pythagoras or Pythagorean Theorem
Vectors 2D (Two-Dimensional)