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圖一 的複本
Author:
Michael Ma
,
GeoGebra Institute of Hong Kong
GeoGebra
New Resources
正方形雪花图案
斜率的值
垂直線的斜率
活动三：应用性质
龙形曲线-分形龙
Discover Resources
Roger Test Draw
習題二
剪刀石頭布
矩阵（自动）计算（数据为0-5的随机数）
初中数学
Discover Topics
Conditional Probability
Boxplot
Equilateral Triangles
Fractal Geometry
Sequences and Series