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學習單：三角形面積
Author:
Tsai, Dung Jung
,
harryau
GeoGebra
New Resources
錐體建築師
三位數除以一位數（二）
兩位數加法
三位數除以一位數（一）
球体的体积推导
Discover Resources
雙曲線語橢圓
了解圓方程(1)
My first Geogebra Book
Tool4P
ptccs2new
Discover Topics
Geometric Distribution
Geometry
Differential Calculus
Cylinder
Sequences and Series