Angle between Two Planes in a Square Pyramid 正四角錐中兩平面間的交角

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[size=150]Drag V or B to change the size of the pyramid.[/size][br][br]gMath 互動數學教室 [url=http://www.geogebra.hk/]http://www.geogebra.hk[/url]
– Alex CHIK

Informatie: Angle between Two Planes in a Square Pyramid 正四角錐中兩平面間的交角