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Author:
羅驥韡 (Pegasus Roe)
GeoGebra
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画直线等分三角形的面积
【案例】2013年安徽高考15题
兩組對邊相等和有直角的四邊形
球體建築師
球体的体积推导（优化版）
Discover Resources
拋物線上的弓形區域
HKMO 2013 Question 3 Demonstration (Geometric Construction)
Dilate 習作
sym1
拋物線3--平行四邊形法
Discover Topics
Inequalities
Natural Numbers
Polygons
Arithmetic
Subtraction