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Perimeter

Author:Ting Chui Yee, Anthony OR 柯志明, Angela Yan

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兩組對邊相等的四邊形
拼砌四邊形
GeoGebra笔记功能体验课件
異分母分數減法
判斷球體

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直向橢圓
等值分數
p10-7
sin, cos, tan 圖像
推移（y 方向）的副本

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Addition
Rhombus
Real Numbers
Matrices
Interest Calculation

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