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Circumference 圓周
Author:
Alex CHIK
GeoGebra
GeoGebra 互動數學教室
http://www.geogebra.hk
New Resources
球體建築師
三位數除以一位數（一）
兩位數除以一位數（一）
兩組對邊相等的四邊形
算柱 (兩位數)
Discover Resources
歪斜線夾四面體
分數除法
CIRCLE
二維
sin(x) 的函數圖形的副本
Discover Topics
Diagrams
Numbers
Translation
Plane Figures or Shapes
Pythagoras or Pythagorean Theorem