I tried several ways and this one fits the most with the least overlap. I thought having the smaller edges against the sides would fit more but that doesn't work out as well.
I usually do two layers and have the second layer rotated by 22.5 degrees (half of 45) as that makes them sit between the ones on the bottom layers, the thickest parts of each are in the middle so if I lay them on top at the same rotation they tend to tip to one side and then the edge that sticks up gets burned before they are fully cooked.

Yes, I eat a lot of these ^^ they're 60 pieces for ~$5 (45 SEK) at the big Asian grocery store in my city. The filling is a nice mix of vegetables with soy beans as protein and spiced with curry and mint, very nice with both soy sauce and sweet chili sauce!