Triangular-enneagonal duoprismatic prism

The triangular-enneagonal duoprismatic prism or trep, also known as the triangular-enneagonal prismatic duoprism, is a convex uniform duoprism that consists of 2 triangular-enneagonal duoprisms, 3 square-enneagonal duoprisms and 9 triangular-square duoprisms.