Two adjoined rotundas.
Birotunda
See also
Bilunabirotunda, Cupolarotunda, Elongated Pentagonal Gyrocupolarotunda, Elongated Pentagonal Orthocupolarotunda, Elongated Pentagonal Orthobirotunda, Gyrocupolarotunda, Gyroelongated Pentagonal Rotunda, Orthobirotunda, Triangular HebesphenorotundaExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Birotunda." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Birotunda.html