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光源距離 Light Source Distance
Author:
W.L. Wong, Albert
GeoGebra
New Resources
三位數除以一位數（二）
【案例】2013年安徽高考15题
球體建築師
柱體建築師
判斷球體
Discover Resources
圓內一點到根軸的距離
S4 Circle Theorems
畢氏定理拼圖
周界(移邊)
球體體積圖解
Discover Topics
Parabola
Scalene Triangles
Pyramid
Variance
Circumcircle or Circumscribed Circle