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兩圓及交弦
Author:
luke huang
GeoGebra
New Resources
直角坐標平面上的旋轉變換
四邉形 (四年級) 教師版
画直线等分三角形的面积
兩位數除以一位數（二）
判斷球體
Discover Resources
Angles in the Circumference and the Centre
Quiz on Addition and Subtraction of Directed Numbers (1) 有向數加減測驗(1)
All you need is
随机模拟实验（撒豆子估算π）的副本
φ的影响
Discover Topics
Arithmetic Operations
Cylinder
Parabola
Definite Integral
Confidence Interval