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試證明:A=B+C
Author:
顏士勛
GeoGebra
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兩位數加法
錐體建築師
兩位數除以一位數(一)
兩位數除以一位數(二)
四邊形的特性
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三视图
畫圖.....
選四塊來拼砌正方形
圓錐曲線---橢圓
maze-temp
两角和的正弦公式几何证明(改进)
Discover Topics
Complex Numbers
Ellipse
Orthocenter
Vectors
Conic Sections