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蔓叶线
Author:
Sylvie
GeoGebra
New Resources
盈利與虧蝕
三角函数 的副本
龙形曲线-分形龙2
斐波那契螺旋弧线（表格法）
第八周作业2
Discover Resources
橢圓規
正多面體
同心圓+等分割線
解題四
随机三角形背景
Discover Topics
Tangent Line or Tangent
Diagrams
LCM and GCD
Inequalities
Planes