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重难题组周练（1）——二次函数
Author:
程洁
Topic:
Quadratic Functions
GeoGebra
New Resources
四邊形的特性
判斷球體
画直线等分三角形的面积
三位數除以一位數（一）
拼砌四邊形
Discover Resources
平行四邊形面積
圓上圓
包絡菱形
P53_3c
圖形的周界
Discover Topics
Function Graph
Natural Numbers
Set Theory
Incircle or Inscribed Circle
Indefinite Integral