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IMO2015C

Author:Terence

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四邊形的特性
兩組對邊相等和有直角的四邊形
Fibonacci Clock
判斷球體
畫出對稱圖形

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車輪
數學模型
Torus
極線對偶定理 / polar duality theorem
定周长的正多边形面积变化规律（含圆）

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Conic Sections
Trigonometry
Perimeter
Logarithm
Rational Numbers

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