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Add and subtract (binary) 2
Author:
Ku, Yin Bon (Albert)
GeoGebra
New Resources
兩位數加法
画直线等分三角形的面积
柱體建築師
拼砌四邊形
兩組對邊相等的四邊形
Discover Resources
反射對稱
三角函數 週期、振幅變化
椭圆的生成
Copy of 費氏螺旋 (試算表)
黄金三角形到螺旋线（表格法）
Discover Topics
Isosceles Triangles
Logic
Distributions
Quadratic Equations
Intersection