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三角形面積公式B2
Author:
maths324324
GeoGebra
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兩組對邊相等的四邊形
球體建築師
兩組對邊相等和有直角的四邊形
判斷球體
兩位數除以一位數（二）
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waaachen
相同圖形的拼砌（有兩組平行線的四邊形）
Flips
算柱
模板
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Rectangle
Differential Calculus
Curve Sketching
Continuity
Prism