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毕氏螺线
Author:
树常青
GeoGebra
New Resources
兩位數除以一位數（一）
四邊形的特性
算柱 (兩位數)
兩組對邊相等的四邊形
錐體建築師
Discover Resources
固定三角形的條件−題5
對稱圖形
一點在圓上跑一點在三角形上跑兩點中點軌跡
example
reflectional symmetry_1
Discover Topics
Quadrilaterals
Conic Sections
Symmetry
Exponent
Histogram