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扇形滚动(圆心角半径可变)
Author:
赵林
GeoGebra
New Resources
球体的体积推导（优化版）
畫出對稱圖形
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
錐體建築師
Discover Resources
優良作品1(沛綺)
maze-temp
圖形的周界
繪本
正方形折纸减去两角
Discover Topics
Integral Calculus
Diagrams
Quadratic Functions
Perimeter
Quadrilaterals