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No.13
Author:
Billy Cheung
GeoGebra
New Resources
正方形雪花图案
撒针估算面积实验
球体的截面
双心四边形
科赫雪花
Discover Resources
三角形內部一點到三頂點距離和最小
Introduce tangent ratio
周界-平移法(練習一)
梯形(面積)
整數
Discover Topics
Statistics
Fractions
Integral Calculus
Orthocenter
Special Points