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蝴蝶定理
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
【案例】圆柱体内放置一个大球六个小球
錐體建築師
找出對稱軸
画直线等分三角形的面积
四邊形的特性
Discover Resources
spinral
畢氏定理
reflection points
测试
元旦快乐（制作：孟宝兴）
Discover Topics
Median Line
Logarithm
Means
Vectors
Line Segment