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相同圖形的拼砌（三角形）
Author:
ho ting chit
Topic:
Triangles
GeoGebra
New Resources
四邊形的特性
兩位數除以一位數（二）
異分母分數減法
兩位數加法
錐體建築師
Discover Resources
梯形的面積
F.3 Ch.10 Application of Trigonometry
-3/2 ≤ cosα + cosβ + cosγ ≤ 3
工具：PlaneString
等轴双曲线
Discover Topics
Statistics
Histogram
Conic Sections
General Quadrilateral
Normal Distribution