Driven out of a serious question, when sharing a slice of cake in a coffee shop how can my two friends split it without going down the middle (the cake is likely to crumble if you do this!)
Given a slice of cake, how can it be divided into two equal parts? Without going 'down the middle'.
How far along the already-cut side of the cake do you need to cut? Assume the slice of cake is a standard circle divided into 8 (N), and has a radius of 15cm (r). Bonus points for a more general solution relating to how many pieces it's cut into (N) and how large the cake is (r).
Is there a more practical solution (or 'close enough') without taking a ruler and calculator to the cafe?
One (vertical, straight) cut only.