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等高的三角形面積變換
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学用数学
GeoGebra
New Resources
龙形曲线-分形龙
中华人民共和国国旗
平行線的判定
常见四边形是否是双心四边形
撒针估算面积实验
Discover Resources
二元一次聯立方程式圖解
學習單：三角形內(外)角合
Quiz on Solving Quadratic Inequalities 解二次不等式：測驗 (v2018)
Parabola_Vertical
圆的面积原理
Discover Topics
Square
Hypergeometric Distribution
Pythagoras or Pythagorean Theorem
Hyperbola
Linear Functions