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七巧板揖人
Author:
李春培
GeoGebra
New Resources
球體建築師
Nested spiral octagon
近似值：有效數字
sanjiaohanshu
兩組對邊相等的四邊形
Discover Resources
funny draw
glt-c02-09 五角柱旋轉
Gaussian Heptagon construction
小一
正方体、正四面体的外接球
Discover Topics
Parabola
Real Numbers
Unit Circle
Straight Lines
Fractions