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World's Second-Hardest Easy Geometry Problem
Author:
Terry Chau
Topic:
Geometry
幾何老題2
GeoGebra
New Resources
【案例】2013年安徽高考15题
兩位數加法
畫出對稱圖形
兩位數除以一位數（二）
四邊形的特性
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Lituus
重心
勝者即正義，可愛即正義～(可用Ctrl+滑鼠滾輪放大界面)
一位数加减法运算自我测评
笛卡兒心臟線 的複本
Discover Topics
Differential Equation
Vectors 3D (Three-Dimensional)
Secant Line or Secant
Subtraction
Optimization Problems