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tan900

Author:tan90

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Nested spiral octagon
兩組對邊相等和有直角的四邊形
算柱 (兩位數)
Fibonacci Clock
兩組對邊相等的四邊形

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ＡＡＡ與ＳＳＡ不一定全等
定周长的正多边形面积变化规律（含圆）
國旗上傳測試
圓心的軌跡方程式
颜畅和完成的图像1

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Area
Secant Line or Secant
Optimization Problems
Sine
Dilation

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