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Elongated pentagonal orthocupolarotunda : ウィキペディア英語版 | Elongated pentagonal orthocupolarotunda
In geometry, the elongated pentagonal orthocupolarotunda is one of the Johnson solids (''J''40). As the name suggests, it can be constructed by elongating a pentagonal orthocupolarotunda (''J''32) by inserting a decagonal prism between its halves. Rotating either the cupola or the rotunda through 36 degrees before inserting the prism yields an elongated pentagonal gyrocupolarotunda (''J''41). ==Formulae== The following formulae for volume and surface area can be used if all faces are regular, with edge length ''a'':〔Stephen Wolfram, "(Elongated pentagonal orthocupolarotunda )" from Wolfram Alpha. Retrieved July 25, 2010.〕
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