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waaachen
Author:
陳兪宏
孟哲老師解法
GeoGebra
New Resources
兩位數加法
球体的体积推导
画直线等分三角形的面积
四邊形的特性
三位數除以一位數（一）
Discover Resources
三下_三角形(學生版)
Area and Volume of a pentagonal prism(正五角棱柱的面積和體積)
directed number_the age of father and son
三角函數的週期變化
justin sin
Discover Topics
Intersection
Plane Figures or Shapes
Similar Triangles
Interest Calculation
Linear Regression