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平移旋轉
Author:
chen mingchuan
GeoGebra
New Resources
平行線的判定
撒针估算面积实验
中华人民共和国国旗
龙形曲线-分形龙2
折扣
Discover Resources
黎曼和
生活中的平面圖形問題1
rotational symmetry_1
雙曲線3--等軸法
公切線的引入
Discover Topics
Planes
Multiplication
Exponent
Equilateral Triangles
Arithmetic