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勾股定理(圖形分割) Pythagorean Theorem by Edwin
Author:
Loi Teng Chong
GeoGebra
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龙形曲线-分形龙
折扣
中华人民共和国国旗
科赫雪花
撒针估算面积实验
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兩圓的公切線
Redefining Trigonometry by a Unit Circle
牛頓定理二
Indices 5
折线匀速动点工具
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Arithmetic Operations
Trigonometry
Congruence
Orthocenter
Geometric Transformations