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硬币
Author:
luodeqin@keleshuxue.com
GeoGebra
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兩位數加法
找出對稱軸
画直线等分三角形的面积
判斷球體
兩組對邊相等和有直角的四邊形
Discover Resources
色彩視覺藝術：三色彩帶
利用描點建構二次函數圖形
迭代出根號n螺旋線
斜坐標
Newton's method
Discover Topics
Intersection
Root
Trapezoid
Secant Line or Secant
Complex Numbers