So basically started from my wedge (already pointed up) and located to the center, then I duplicated it and turn what soon to be the “WedgeBottom” down to 180 degrees via X axis. After positioning the 2 wedges to make room for the cube, I added the cube and positioned it between the 2 wedges. I had to do re-positioning with the verticies via Edit Mode to align each of the objects, once merged I “Joined” the three objects in the Tool Panel.
Edit: I didn’t know what was a periscope before this 