Elongated pentagonal orthocupolarotunda

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In geometry, the elongated pentagonal orthocupolarotunda is one of the Johnson solids (J40Script error: No such module "Check for unknown parameters".). As the name suggests, it can be constructed by elongating a pentagonal orthocupolarotunda (J32Script error: No such module "Check for unknown parameters".) 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 (J41Script error: No such module "Check for unknown parameters".).

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File:J40 elongated pentagonal orthocupolarotunda.stl
3D model of an elongated pentagonal orthocupolarotunda

Formulae

The following formulae for volume and surface area can be used if all faces are regular, with edge length a:[1]

V=512(11+55+65+25)a316.936...a3
A=14(60+10(190+495+2175+305))a233.5385...a2

References

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External links

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