Just don't break it and let it fall in the water naturally when the bottom softens up. It doesn't take long enough for there to be any issues like noodles cooked well on one side and not the other.
That method only works with large pots. Small pots will not allow the full 25 cm strand to fall into the pot until most of the other side is beyond that 'doesn't matter' length of time.
There are many forms of pasta that don’t have this problem.
Just break it towards the pot, over the pot... Done.