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圓周 (圖形G)
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。
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兩組對邊相等和有直角的四邊形
四邊形的特性
球體建築師
兩位數加法
找出對稱軸
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GeoGebra資料上傳
正四面體
DSE Circle-ACT05B Exterior Angle of a Cyclic Quadrilateral
Copy of 圓的面積
开关灯游戏
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Mathematics
Exponential Functions
Straight Lines
Statistics
Perimeter