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最小周長
Author:
張丰耘
GeoGebra
New Resources
四邊形的特性
兩組對邊相等和有直角的四邊形
画直线等分三角形的面积
三位數除以一位數（一）
兩位數除以一位數（一）
Discover Resources
雙曲線語橢圓
ggb-fs-a2
周界
Space-filling curve2
Interesting Geometric Theorem
Discover Topics
Rational Numbers
Planes
Function Graph
Centroid or Barycenter
Straight Lines