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等邊三角形
Author:
sam lam
GeoGebra
New Resources
科赫雪花
科氏力 (Coriolis Force)
双心四边形
百分數及其應用
第八周作业
Discover Resources
面积与面积问题
正四面體
小數加減
繡曲線02
勾股树的副本
Discover Topics
Symmetry
Histogram
Distributions
Polygons
Area