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Author:
风亦飞
GeoGebra
New Resources
錐體建築師
【案例】圆柱体内放置一个大球六个小球
畫出對稱圖形
兩組對邊相等和有直角的四邊形
球体的体积推导（优化版）
Discover Resources
兩函數間面積
底數小於1的指數變化
labyrinth
五邊形的簡介
US Unemployment 200701~201707
Discover Topics
Orthocenter
Quadrilaterals
Cosine
Rhombus
Kite