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三角形的内角和
Author:
孙逸旻
旋转直线AC,观察三角形内角的变化,并求内角和
GeoGebra
New Resources
異分母分數減法
球體建築師
找出對稱軸
三位數除以一位數(二)
畫出對稱圖形
Discover Resources
梯形有甚麼特性?
平移
Distributive Law of Multiplication 1 (乘法的分配率 1)
對稱成分(零序.正序.負序)
旁心
Discover Topics
Dilation
Kite
Pie Chart or Circle Chart
Isosceles Triangles
Centroid or Barycenter