"Delta Clipper"/DC-Y technical question

Sorry for posting, but I had an aeronautical question I need some help with.

I’ve been planning to make a flight sim version of a spacecraft called the DC-Y, of which the famed vtol “Delta Clipper” was a smaller-scale prototype. I’ve been able to find information on weights, dimensions, engine thrust, even fuel consumption…

…What I haven’t been able to find out, however, is whether the design for the somewhat cone-shaped DC-Y had four sides, or only three. Can anyone help?

Well, thanks for your patience,
Ranchoth

Here is an image from a model kit

Looks to me like four sides.