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perimeter

Author:Yip Sin Yue, spkwan, GeoGebra Institute of Hong Kong

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兩位數加法
兩位數除以一位數（一）
畫出對稱圖形
小数的副本
柱體建築師

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正餘弦函數的疊合之二102.11.29
tool
-3/2 ≤ cosα + cosβ + cosγ ≤ 3
sin(x) 的函數圖形的副本
Slope of a tangent 切線斜率

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Optimization Problems
Scatter Plot
Binomial Distribution
Orthocenter
Polygons

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