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三角函數的週期變化
Author:
luke huang
GeoGebra
New Resources
【案例】2018年全国1卷理科12题
判斷球體
【案例】2013年安徽高考15题
三位數除以一位數（二）
算柱 (兩位數)
Discover Resources
Choose the most suitable 'improvised units'(中間人)
gjc100a34 兩三角形重疊面積比
homework
兩位數乘兩位數直式
算盘
Discover Topics
Rhombus
Curve Sketching
Polygons
Ratios
Centroid or Barycenter