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内外弦图1
Author:
张书真
Topic:
Pythagoras or Pythagorean Theorem
GeoGebra
New Resources
探究三角形的全等條件
垂直線的斜率
異分母分數減法
漂亮的摇摆曲线
兩位數除以一位數（二）
Discover Resources
Tiling 2
Perimeter
任意角的三角函数
正三角形堆垛
平移練習
Discover Topics
Boxplot
Differential Calculus
Linear Programming or Linear Optimization
Means
Straight Lines