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S4E13方圆镜面错觉
Author:
宋晓燕
GeoGebra
New Resources
四邊形的特性
判斷球體
球體建築師
三位數除以一位數（二）
【案例】2018年全国1卷理科12题
Discover Resources
阿基米德(4,6,6)
大圓在小圓上滾動
y=asin(kx+b)+c的圖形1061030
边长可变的正三角形上莱洛转子的滚动
畢氏定理-面積切割法
Discover Topics
Fractions
Sphere
Isosceles Triangles
Intersection
Hypergeometric Distribution