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保持比例
Author:
hjyanghj
Topic:
Geometry
GeoGebra
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兩位數除以一位數（二）
兩位數除以一位數（一）
錐體建築師
算柱 (兩位數)
畫出對稱圖形
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等棍的包絡線
立體圖形 KH
Triangles with the same height
畫等腰直角三角形 題3
拋物線代數性質,光學性質
Discover Topics
Conic Sections
Arithmetic Operations
Sphere
Geometric Mean
Confidence Interval