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ie 2
Author:
LAM YU SANG
GeoGebra
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拼砌四邊形
三位數除以一位數（二）
兩組對邊相等的四邊形
画直线等分三角形的面积
兩位數加法
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扇形概念與面積
Drag Q. Locus of P?
解題一
圖形拼砌
二次函數a的意義
Discover Topics
Incircle or Inscribed Circle
Bar Chart or Bar Graph
Surface
Statistical Characteristics
Arithmetic Mean