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bicone
A bicone or dicone (Bi- comes from Latin, Di- from Greek.) is the three-dimensional surface of revolution of a rhombus around one of its axes of symmetry. Such a bicone has circular symmetry and orthogonal bilateral symmetry. Alternatively, one can view a bicone as the surface created by joining two congruent right circular cones base-to-base. == Geometry == For a circular bicone with radius ''R'' and height center-to-top ''H'', the formula for volume becomes : For a right circular cone, the surface area is : where is the slant height.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「bicone」の詳細全文を読む
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