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Circumference 圓周
Author:
Alex CHIK
GeoGebra
GeoGebra 互動數學教室
http://www.geogebra.hk
New Resources
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
畫出對稱圖形
算柱 (兩位數)
近似值：有效數字
Discover Resources
機率分布圖
圓周 (圖形I)
同心圓內的直線2
阴影部分例子
projection01 by Mr LO WY
Discover Topics
Indefinite Integral
Congruence
Fractions
Diagrams
Pyramid