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二次函数y=ax²（a＞0)
Author:
吕胜
GeoGebra
New Resources
球体的体积推导（优化版）
拼砌四邊形
【案例】2013年安徽高考15题
【案例】2018年全国1卷理科12题
異分母分數減法
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task3
鋪地磚(六邊形)
p04 fixed distance from a line
三角測量01
B6 二次函數
Discover Topics
Centroid or Barycenter
Rotation
Isosceles Triangles
Quadrilaterals
Square