Triangle (Fallout 3)

The triangle is an item in Fallout 3 and Fallout: New Vegas, only usable as Rock-It Launcher ammunition or for decoration.

It cannot fit a full set of billiard balls inside of it, only taking about 4 balls.

Locations
They are pretty difficult to find in the Wasteland as there aren't many of them and they are mostly found on pool tables.
 * One in the Rivet City marketplace.
 * One in the Talon Company outpost near the Arlington Library.
 * One in the Arlington Library, in the media archives.
 * One at Tenpenny tower, in the Federalist Lounge.
 * One in Paradise Falls, in the barracks.
 * One in the Old Olney underground, in the eastern-most chamber, upstairs next to the pool table.