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正四角錐
Author:
康靖坤
可以旋轉， 顯示邊， 選擇透視
GeoGebra
New Resources
柱體建築師
兩組對邊相等的四邊形
球體建築師
兩位數除以一位數（一）
錐體建築師
Discover Resources
畢氏定理動態證明(四塊直角三角形移動)
demo
cos(π/n)cos(2π/n)cos(3π/n) ... cos(nπ/n) = ?
圓冪：到兩點的內積
完全图
Discover Topics
Right Triangles
Statistics
Constructions
Trapezium
Equilateral Triangles