Like, why wouldn't people be interested in knowing that the African slave trade of the colonial period actually started with Jewish kids, but they all died in the African climate of Sao Tome, so the Portuguese started buying slaves from the Congolese, which they captured from neighboring tribes, to work the fields??
You've got me curious about this now too lol. I work with games and love this kind of thing. I'll know more once I'm not trying to do research on a phone, but the squaring part looks like just a distance formula (A^2 + B^2 = C^2). My very rough guess with the subtracting and adding is you're basically doing vector math but I'm unsure. I can respond or edit later as I find out more.