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圓周 (圖形I)
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
sanjiaohanshu
美國國旗 (Claude 版)
兩組對邊相等和有直角的四邊形
AI 訓練教室
Earth with coastline
Discover Resources
平面幾何
活動工作紙LEVEL01
奠基
任意三角形
黃金三角形
Discover Topics
Continuity
Histogram
Median Line
Cone
Normal Distribution