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Author:
徐熙伟
GeoGebra
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算柱 (兩位數)
兩組對邊相等和有直角的四邊形
拼砌四邊形
兩位數加法
三位數除以一位數（二）
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三角形的分割與組合(2)
[問題] G1, G2, G3 為△ACG, △ABG, △BCG 的重心
讀磅
Trigonometric Relations(180,360)
S6 Vectors
Discover Topics
Cuboid
Similarity Transformation or Similarity
Square
Logarithmic Functions
Ratios