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Author:
袁智强
GeoGebra
New Resources
撒针估算面积实验
第八周作业
常见四边形是否是双心四边形
斐波那契螺旋弧线(表格法)
第三周作业效果演示
Discover Resources
廣義角
正方形
HKCEE-AM 2010 Q17 additional part
Interest(利息)
ie 4
Discover Topics
Symmetry
Inequalities
Fractions
Line Segment
LCM and GCD