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Elongated triangular gyrobicupola : ウィキペディア英語版 | Elongated triangular gyrobicupola
In geometry, the elongated triangular gyrobicupola is one of the Johnson solids (''J''36). As the name suggests, it can be constructed by elongating a "triangular gyrobicupola," or cuboctahedron, by inserting a hexagonal prism between its two halves, which are congruent triangular cupolae (''J''3). Rotating one of the cupolae through 60 degrees before the elongation yields the triangular orthobicupola (''J''35). ==Formulae== The following formulae for volume and surface area can be used if all faces are regular, with edge length ''a'':〔Stephen Wolfram, "(Elongated triangular gyrobicupola )" from Wolfram Alpha. Retrieved July 25, 2010.〕
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