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Author:
李詠甯
GeoGebra
New Resources
判斷球體
画直线等分三角形的面积
兩組對邊相等的四邊形
【案例】2013年安徽高考15题
兩位數除以一位數（二）
Discover Resources
平行線的性質
VV圓
角平分線性質
生活中的平面圖形─四邊形的性質
angles sum on a striaght line
Discover Topics
Piecewise Functions
Upper and Lower Sum or Riemann Sum
Mathematics
Means
Pythagoras or Pythagorean Theorem