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23平行线周长正方形
Author:
万超杰
GeoGebra
New Resources
異分母分數減法
判斷球體
兩組對邊相等的四邊形
画直线等分三角形的面积
三位數除以一位數（二）
Discover Resources
國中數學
clock
公因數應用題2
hihihi
〃One〃
Discover Topics
Surface
Variance
Confidence Interval
Centroid or Barycenter
Linear Programming or Linear Optimization