Hey I got it I think 
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I duplicated the wedges, rotate it 180 then placed it under the other one. Add a cude in the middle, set its size accordingly. For the base, I selected the bottom edge, place the cursor there, and then set origin to cursor. Then it’s easy to just reset the cursor to 0,0,0 and move the location through the transform tool.
et Voila!
Looking from the side view though, I fear there was a slight rotation on my wedges before I started… resulting in a small error in the shape. I hope we learn how to fix things like that.
