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畫鐘面
Author:
GeoGebra Institute of Hong Kong
GeoGebra
New Resources
異分母分數減法
兩組對邊相等和有直角的四邊形
判斷球體
画直线等分三角形的面积
兩位數除以一位數（二）
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TEST
對稱圖形
繡曲線01
用向量找北极星
繪畫平行四邊形
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Random Experiments
Logic
Trapezoid
Centroid or Barycenter
Definite Integral