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circle: line from centre
Author:
Ng Ching Yi
GeoGebra
New Resources
近似值：有效數字
拼砌四邊形
sanjiaohanshu
四邊形的特性
直角坐標平面上的旋轉變換
Discover Resources
分數除法4: 1 ÷ a/b (包含)
數據分析2
面積與周界活動
密鋪
圖形的周界
Discover Topics
Square
Indefinite Integral
Quadrilaterals
Secant Line or Secant
Step Functions