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祖冲之的期望：内棋与外棋
Author:
孟宝兴
GeoGebra
New Resources
柱體建築師
兩位數除以一位數（一）
找出對稱軸
【案例】2013年安徽高考15题
【案例】2018年全国1卷理科12题
Discover Resources
单位圆画三角函数图像
長方形面積法 _單項式乘法
Tangent of circle
函數
operation of matrix
Discover Topics
Linear Functions
Upper and Lower Sum or Riemann Sum
Calculus
Definite Integral
Subtraction