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同旁內角---不平行綫
Author:
chanfushun
GeoGebra
New Resources
兩組對邊相等的四邊形
画直线等分三角形的面积
兩位數除以一位數（一）
算柱 (兩位數)
【案例】2013年安徽高考15题
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優良作品4(昀潔)
正四面体分形
Angle at Centre and Angle at circumference
數學傳播39卷4期, 平面幾何公式思考
正三角形在长方形边上移动加滚动
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Binomial Distribution
Integral Calculus
Quadratic Functions
Upper and Lower Sum or Riemann Sum
Root