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制作Escher阶梯20191124
Author:
王巍
GeoGebra
New Resources
兩位數除以一位數（一）
四邊形的特性
【案例】2013年安徽高考15题
異分母分數減法
畫出對稱圖形
Discover Resources
九點圓 (9-Point Circle)
Quiz on Interest 利息：測驗
兩位小數
百分位分數
同位角__垂直平行綫
Discover Topics
Tangent Line or Tangent
Frequency Distribution
Upper and Lower Sum or Riemann Sum
Quadrilaterals
Area