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製作梯形1 Making trapezium 1
Author:
周錦鋒
GeoGebra
New Resources
異分母分數減法
畫出對稱圖形
找出對稱軸
柱體建築師
球體建築師
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GGB研習作品
Trapezium fixed height
排列組合
Ex (SAS)
固定周界的長方形的面積變化（周界是200厘米）
空间立方体
Discover Topics
Arithmetic Mean
Median Line
Geometry
Coordinates
Differential Calculus