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因數（1至24）
Author:
Tong Wing Hong
GeoGebra
New Resources
算柱 (兩位數)
sanjiaohanshu
四邉形 (四年級) 教師版
近似值：有效數字
判斷球體
Discover Resources
平行四邊形中點連線及分角線交點連線形狀
擺線
三平行線上作正三角形
parmater
〃Two〃
Discover Topics
Numbers
Plane Figures or Shapes
Geometry
Ellipse
Optimization Problems