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Author:
罗有柱
GeoGebra
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龙形曲线-分形龙
平行線的判定
百分數及其應用
中华人民共和国国旗
正方形雪花图案
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百分數：折扣、盈利與虧損
Pythagorean Triples 畢氏數組
y=sinx的伸縮平移
謝爾賓斯基三角形
二倍角的正弦公式的证明
Discover Topics
Linear Programming or Linear Optimization
Vectors 3D (Three-Dimensional)
Tangent Line or Tangent
Special Points
General Quadrilateral