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3外切圓
Author:
陳兪宏
GeoGebra
New Resources
畫出對稱圖形
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
画直线等分三角形的面积
三位數除以一位數（二）
Discover Resources
畢氏定理
P6 Maths
求一數是另一數的幾分之幾？
三角函数定积分的动态演示.许兴华数学
乘法计时训练
Discover Topics
Prism
Equilateral Triangles
Logarithmic Functions
Optimization Problems
Stochastic Process or Random Process