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相似三角形條件 - 三邊成比例
Author:
AaronLau
GeoGebra
New Resources
空间中两直线的位置关系
探究三角形的全等條件
球体的体积推导（优化版）
斜率的值
三位數除以一位數（二）
Discover Resources
軌跡二︰移動點與兩固定點保持相等距離(垂直平分線)
directed number_magnet model
Similar triangles in a triangle
Directed numbers
Quiz on Addition and Subtraction of Directed Numbers (2)
Discover Topics
Reflection
Conditional Probability
Indefinite Integral
Difference and Slope
Optimization Problems