>>11520054First, you should only be looking at points on these 3 surfaces (or their edges), since the object is symmetrical in respect to 3 different axes and yes that's important. A point somewhere else means there's another shorter route to that point that we can't see, since you've reached the half way point for some other line.
Tbh once you get to this point it's pretty obvious how to arrive at the right answer. Obviously different shapes would have a different method of determining it but in this case it's triangles
