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四邊形內部反射_長寬角度可調整
Author:
boooooooyu
GeoGebra
New Resources
圓的基本性質
平行線的斜率
常见四边形是否是双心四边形
科氏力 (Coriolis Force)
斜率的值
Discover Resources
ie 4
S6 3D Basic Concept
Copy of 畫三角形 題2c
集合间基本关系(wd)
椭圆的一种画法.许兴华数学