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欢度春节（灯笼）
Author:
zgc112
GeoGebra
New Resources
找出對稱軸
拼砌四邊形
兩組對邊相等和有直角的四邊形
GeoGebra笔记功能体验课件
異分母分數減法
Discover Resources
伸縮變換
三角形內切三圓
test02繪本用
集合的小结
St. Line
Discover Topics
Pyramid
Conic Sections
Sine
General Quadrilateral
Rotation