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y=ax^2+bx+c
Author:
Albert Wong
GeoGebra
New Resources
兩位數加法
球体的体积推导（优化版）
垂直線的斜率
圓周公式的應用
多邊形的面積
Discover Resources
賴尚欣_等差數列與級數_排數字
正方形截痕
ABC 2
量度身高
test06
Discover Topics
Rotation
Vectors 2D (Two-Dimensional)
Pie Chart or Circle Chart
Similar Triangles
Unit Circle