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Perimeter

Author:Janice Wong, Anthony OR 柯志明

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拼砌四邊形
sanjiaohanshu
近似值：有效數字
Nested spiral octagon
四邊形的特性

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glt-c02-09 五角柱旋轉
圓錐曲線 vs.雙曲線定義式
F.3 Q5 BQ
扇形面積公式3
Graph of Tangent

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Differential Calculus
Plane Figures or Shapes
Boxplot
Congruence
Arithmetic

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