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三節棍
Author:
chen mingchuan
GeoGebra
New Resources
異分母分數減法
兩組對邊相等的四邊形
兩位數除以一位數（一）
畫出對稱圖形
兩組對邊相等和有直角的四邊形
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真分數相乘
三角形面積公式A
橢圓軌跡_過圓內一點與圓內切
syps 邊長與三角形
七巧板的副本
Discover Topics
Logic
Tangent Line or Tangent
Centroid or Barycenter
Rectangle
Tree Diagrams