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fchengang
Author:
符成岗
GeoGebra
New Resources
科氏力 (Coriolis Force)
正方形雪花图案
常见四边形是否是双心四边形
折扣
活动三：应用性质
Discover Resources
西姆松定理推廣(西姆松圓)
正四角錐兩側面夾角
題一
angle between 2 planes 01
橢圓3-平行四邊形法
Discover Topics
Arithmetic Operations
Right Triangles
Hypergeometric Distribution
Sine
Plane Figures or Shapes