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sine graph (reduce to 1/2 and then translate leftward by 15 degree)
Author:
Queenie Chan
GeoGebra
New Resources
兩組對邊相等的四邊形
【案例】2018年全国1卷理科12题
找出對稱軸
画直线等分三角形的面积
球体的体积推导（优化版）
Discover Resources
GeoGebra繪本
Quiz on Scientific Notation
正多角錐(簡易)
p05 eqidistant from two lines
弧長與圓心角成比例
Discover Topics
Quadrilaterals
Upper and Lower Sum or Riemann Sum
LCM and GCD
Special Points
Square