As the name suggests , it can be constructed by gyroelongating a pentagonal rotunda ( J ) by attaching a decagonal antiprism to its base .
In geometry , the gyroelongated pentagonal rotunda is one of the Johnson solids ( J ) .
As the name suggests , rotunda can be constructed by gyroelongating a pentagonal rotunda ( J ) by attaching a decagonal antiprism to rotunda 's base .
In geometry , the gyroelongated pentagonal rotunda is one of the Johnson solids ( J ) .