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畢達哥拉斯的磁磚觀察
Author:
学用数学
GeoGebra
New Resources
直線的斜率
兩位數加法
【案例】2013年安徽高考15题
垂直線的斜率
球体的体积推导（优化版）
Discover Resources
極坐標
向量和的試題１
Addition and Subtraction of Polynomials(多項式的加減法)
congruent (SSS)
数线段
Discover Topics
Perimeter
Linear Equations
Rectangle
Dilation
Geometry