Question: plotting a triangular solid

Hello! 

I'm trying to plot the 3d graph of a solid in Maple 16. The solid is generated by equilateral triangles. One vertex is  A(x,0,0), and the other one, B, moves on the circunference described by: y^2+x^2=121, z=0. The AB segment is always parallel to the Y axis and the triangles are in the yz plane. In other words, one side (of each triangle) is sqrt(121-x^2).

I tried using the spacecurve command to start plotting lines but then I didn't know how to use it properly, so each time I tried to 3dplot I got a different type of error. Also, I had trouble defining the intervals; x should move between -11 and 11, y between 0 and 11 but z? I'm having trouble with that one.

So, basically, I need help plotting this solid.  Thanks :)