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勾股定理1
Author:
Niehanyu
GeoGebra
New Resources
龙形曲线-分形龙
异形操场
撒针估算面积实验
科赫雪花
直線的斜率：水平變化 & 鉛垂變化
Discover Resources
Angle at Centre
謝爾賓斯基三角形(Sierpinsky)
國旗
角定義
長方形
Discover Topics
Linear Functions
Sequences and Series
Cosine
Addition
Solids or 3D Shapes