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4.6兩角和與差的正弦、餘弦、正切(一)
Author:
user9429
GeoGebra
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判斷球體
畫出對稱圖形
三位數除以一位數（二）
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
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MFS Pyth Thm 1
生活中的平面圖形關係─相似
比例中的定值問題(三)
yuanmianjituidao
圓錐曲線－圓錐截痕
Discover Topics
Parallelogram
Numbers
Median Value
Upper and Lower Sum or Riemann Sum
Similar Triangles