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peacock
Author:
李春培
peacock
GeoGebra
New Resources
拼砌四邊形
sanjiaohanshu
兩組對邊相等的四邊形
近似值：有效數字
錐體建築師
Discover Resources
一點點小範例
三角形的邊長
四下_面積（一）(學生版)
中國火柴遊戲二的副本
标题
Discover Topics
Rectangle
Random Variables
Trigonometric Functions
Real Numbers
Tangent Function