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GGB printable logo 3
Author:
袁智强
GeoGebra
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垂直線的斜率
斜率的值
三角函数 的副本
盈利與虧蝕
龙形曲线-分形龙2
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賺賠：例3
愛心
向外延伸的多邊形
旁心
Cross Product for 2D Vectors (平面外積)
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Incircle or Inscribed Circle
Sequences and Series
Tangent Function
Parabola
Numbers