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冲关选18
Author:
黄旭
GeoGebra
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四邊形的特性
柱體建築師
兩組對邊相等的四邊形
錐體建築師
算柱 (兩位數)
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畫方格
根號n的做圖法之二
GGB 基礎教學（平面幾何）
輪子轉動問題_求直徑和半徑
自製工具：CurveFit, Bezier
Discover Topics
Scatter Plot
Trigonometry
Centroid or Barycenter
Distributions
Indefinite Integral