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it's for fun
Author:
dunst kang
it's for fun
GeoGebra
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兩位數加法
三位數除以一位數（一）
錐體建築師
兩組對邊相等和有直角的四邊形
找出對稱軸
Discover Resources
中線定理(阿波羅尼奧斯)定理推廣二：向四邊形推廣
圖形周界_2
層層套疊的四邊形
百分數：折扣 / 賺賠
里约奥运火炬花环模型
Discover Topics
Quadrilaterals
Equations
Vectors 3D (Three-Dimensional)
Piecewise Functions
Optimization Problems