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诱导公式四（原点对称关系）
Author:
桃篮翁
GeoGebra
New Resources
兩組對邊相等的四邊形
錐體建築師
GeoGebra笔记功能体验课件
拼砌四邊形
【案例】圆柱体内放置一个大球六个小球
Discover Resources
切3塊拼成正方形
題 7
卡特蘭數 (Catalan Number)
圓柱曲面
正方体展开的动态
Discover Topics
Inequalities
Differential Calculus
Congruence
Random Variables
Parabola