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蜗牛壳模型
Author:
孟宝兴
GeoGebra
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讀磅
多邊形的面積
百分數及其應用
盈利與虧蝕
比較五件物件的重量
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三角形的三中線交於一點(重心)
面積與積分值
Equal arcs, equal angles, equal chords
Copy of 周界
函数作图工具的副本
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Random Variables
Division
Isosceles Triangles
Statistics
Logic