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XY04 成都地铁
Author:
学用数学
GeoGebra
New Resources
柱體建築師
四邊形的特性
兩組對邊相等的四邊形
算柱 (兩位數)
兩位數除以一位數（一）
Discover Resources
normal vector
Orthographic views example
拼貼動畫
三圓外切
小球弹射
Discover Topics
Cuboid
Optimization Problems
Pyramid
Inequalities
Cosine