A gyroelongated triangular bicupola is formed by attaching two triangular cupolas to the two hexagonal bases of a hexagonal
antiprism.
The convex equilateral form with regular polygonal faces
is the Johnson solid 
.
It has 18 polyhedron vertices, 42 polyhedron edges, and 26 faces. The faces
consist of 20 equilateral triangles and 6
squares (McCooey).
See also
Antiprism,
Bicupola,
Triangular Cupola
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References
Johnson, N. W. "Convex Polyhedra with Regular Faces." Canad. J. Math. 18, 169-200, 1966. https://doi.org/10.4153/CJM-1966-021-8.McCooey,
D. I. "Gyroelongated Triangular Bicupola." https://dmccooey.com/polyhedra/GyroelongatedTriangularBicupola.html.Referenced
on Wolfram|Alpha
Gyroelongated Triangular
Bicupola
Cite this as:
Weisstein, Eric W. "Gyroelongated Triangular
Bicupola." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/GyroelongatedTriangularBicupola.html
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