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练习十三
Author:
灵活的小胖
Topic:
Plane Figures or Shapes
GeoGebra
New Resources
兩組對邊相等的四邊形
畫出對稱圖形
球體建築師
四邉形 (四年級) 教師版
三位數除以一位數（一）
Discover Resources
矩形
常態分布和標準差 Normal Distribution and Standard Deviation
雙橢
doto属性研究
切线
Discover Topics
Scalene Triangles
Division
Distributions
Logic
General Quadrilateral