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Conic section-ellipse&hyperbola
Author:
MathChou
GeoGebra
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兩位數加法
兩組對邊相等和有直角的四邊形
拼砌四邊形
畫出對稱圖形
錐體建築師
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對稱
測試1
门禁系统
放射狀圖形(1)
祖暅原理
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Similar Triangles
Incircle or Inscribed Circle