These two shapes might seem like different sizes, but surprisingly enough you can fit the exact same pieces in both! 

The geometry makes it possible to have the same four pieces in both the square and the triangle, using some math explained in pmoews model. 

If you want the honeycomb pattern like in the pictures, it's possible to make in the slicer. You need to set the top and bottom layers to 0, and then the infill pattern to honeycomb. I used 20% infill, but you can use however much you want. This also works with any kind of infill, so if you use any other type let me see by posting a make!