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三角形的面積
Author:
Anthony OR 柯志明
Topic:
Area
,
Triangles
GeoGebra
New Resources
兩位數除以一位數（二）
四邉形 (四年級) 教師版
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
異分母分數減法
Discover Resources
Net of cone
相机快门模拟
梅花
Illusion-平行线错觉
cube(方块堆叠)
Discover Topics
Binomial Distribution
Root
Intersection
Vectors 3D (Three-Dimensional)
Subtraction