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圓周 (圖形D)
Author:
Keith Ko
移動右圖中的紅線到左方虛線，就知道它是相等於左圖的哪條線。
GeoGebra
New Resources
三位數除以一位數（一）
拼砌四邊形
算柱 (兩位數)
判斷球體
兩位數除以一位數（一）
Discover Resources
经纬度
真分數、假分數和帶分數
DSE Mathematics
Circumcentre
새로운 양식
Discover Topics
Rotation
Prism
Division
Incircle or Inscribed Circle
Hypothesis Testing